diff --git a/lib/src/element_type.dart b/lib/src/element_type.dart
index b50da3796e..ab5430fc6a 100644
--- a/lib/src/element_type.dart
+++ b/lib/src/element_type.dart
@@ -220,7 +220,7 @@ class ParameterizedElementType extends DefinedElementType with Rendered {
       packageGraph.rendererFactory.parameterizedElementTypeRenderer;
 
   @override
-  late final Iterable<ElementType> typeArguments = type.typeArguments
+  late final List<ElementType> typeArguments = type.typeArguments
       .map((f) => modelBuilder.typeFrom(f, library))
       .toList(growable: false);
 }
@@ -238,7 +238,7 @@ mixin Aliased implements ElementType, ModelBuilderInterface {
   late final ModelElement aliasElement =
       modelBuilder.fromElement(typeAliasElement);
 
-  late final Iterable<ElementType> aliasArguments = type.alias!.typeArguments
+  late final List<ElementType> aliasArguments = type.alias!.typeArguments
       .map((f) => modelBuilder.typeFrom(f, library))
       .toList(growable: false);
 }
@@ -422,7 +422,7 @@ class CallableElementType extends DefinedElementType with Rendered, Callable {
       packageGraph.rendererFactory.callableElementTypeRenderer;
 
   @override
-  late final Iterable<ElementType> typeArguments = type.alias?.typeArguments
+  late final List<ElementType> typeArguments = type.alias?.typeArguments
           .map((f) => modelBuilder.typeFrom(f, library))
           .toList(growable: false) ??
       const [];
diff --git a/lib/src/generator/templates.runtime_renderers.dart b/lib/src/generator/templates.runtime_renderers.dart
index c617f95562..f7a8c98686 100644
--- a/lib/src/generator/templates.runtime_renderers.dart
+++ b/lib/src/generator/templates.runtime_renderers.dart
@@ -2121,7 +2121,7 @@ class _Renderer_Constructable extends RendererBase<Constructable> {
                   renderVariable: (CT_ c, Property<CT_> self,
                           List<String> remainingNames) =>
                       self.renderSimpleVariable(
-                          c, remainingNames, 'Iterable<Constructor>'),
+                          c, remainingNames, 'List<Constructor>'),
                   renderIterable: (CT_ c, RendererBase<CT_> r,
                       List<MustachioNode> ast, StringSink sink) {
                     return c.constructors.map((e) => _render_Constructor(
@@ -2913,7 +2913,7 @@ class _Renderer_Container extends RendererBase<Container> {
                   renderVariable: (CT_ c, Property<CT_> self,
                           List<String> remainingNames) =>
                       self.renderSimpleVariable(
-                          c, remainingNames, 'Iterable<Operator>'),
+                          c, remainingNames, 'List<Operator>'),
                   renderIterable: (CT_ c, RendererBase<CT_> r,
                       List<MustachioNode> ast, StringSink sink) {
                     return c.declaredOperators.map((e) =>
@@ -4684,7 +4684,7 @@ class _Renderer_Enum extends RendererBase<Enum> {
                   renderVariable: (CT_ c, Property<CT_> self,
                           List<String> remainingNames) =>
                       self.renderSimpleVariable(
-                          c, remainingNames, 'Iterable<Field>'),
+                          c, remainingNames, 'List<Field>'),
                   renderIterable: (CT_ c, RendererBase<CT_> r,
                       List<MustachioNode> ast, StringSink sink) {
                     return c.publicEnumValues.map((e) =>
@@ -7444,7 +7444,7 @@ class _Renderer_InheritingContainer extends RendererBase<InheritingContainer> {
                   renderVariable: (CT_ c, Property<CT_> self,
                           List<String> remainingNames) =>
                       self.renderSimpleVariable(
-                          c, remainingNames, 'Iterable<Method>'),
+                          c, remainingNames, 'List<Method>'),
                   renderIterable: (CT_ c, RendererBase<CT_> r,
                       List<MustachioNode> ast, StringSink sink) {
                     return c.declaredMethods.map((e) =>
@@ -8235,7 +8235,7 @@ class _Renderer_Library extends RendererBase<Library> {
                   renderVariable: (CT_ c, Property<CT_> self,
                           List<String> remainingNames) =>
                       self.renderSimpleVariable(
-                          c, remainingNames, 'Iterable<String>'),
+                          c, remainingNames, 'List<String>'),
                   renderIterable: (CT_ c, RendererBase<CT_> r,
                       List<MustachioNode> ast, StringSink sink) {
                     return c.allOriginalModelElementNames.map((e) =>
@@ -8449,7 +8449,7 @@ class _Renderer_Library extends RendererBase<Library> {
                   renderVariable: (CT_ c, Property<CT_> self,
                           List<String> remainingNames) =>
                       self.renderSimpleVariable(
-                          c, remainingNames, 'Iterable<ExtensionType>'),
+                          c, remainingNames, 'List<ExtensionType>'),
                   renderIterable: (CT_ c, RendererBase<CT_> r,
                       List<MustachioNode> ast, StringSink sink) {
                     return c.extensionTypes.map((e) => _render_ExtensionType(
@@ -8462,7 +8462,7 @@ class _Renderer_Library extends RendererBase<Library> {
                   renderVariable: (CT_ c, Property<CT_> self,
                           List<String> remainingNames) =>
                       self.renderSimpleVariable(
-                          c, remainingNames, 'Iterable<Extension>'),
+                          c, remainingNames, 'List<Extension>'),
                   renderIterable: (CT_ c, RendererBase<CT_> r,
                       List<MustachioNode> ast, StringSink sink) {
                     return c.extensions.map((e) =>
@@ -8688,7 +8688,7 @@ class _Renderer_Library extends RendererBase<Library> {
                   renderVariable: (CT_ c, Property<CT_> self,
                           List<String> remainingNames) =>
                       self.renderSimpleVariable(
-                          c, remainingNames, 'Iterable<TopLevelVariable>'),
+                          c, remainingNames, 'List<TopLevelVariable>'),
                   renderIterable: (CT_ c, RendererBase<CT_> r,
                       List<MustachioNode> ast, StringSink sink) {
                     return c.properties.map((e) => _render_TopLevelVariable(
@@ -13126,7 +13126,7 @@ class _Renderer_ParameterizedElementType
                       renderVariable: (CT_ c, Property<CT_> self,
                               List<String> remainingNames) =>
                           self.renderSimpleVariable(
-                              c, remainingNames, 'Iterable<ElementType>'),
+                              c, remainingNames, 'List<ElementType>'),
                       renderIterable: (CT_ c, RendererBase<CT_> r,
                           List<MustachioNode> ast, StringSink sink) {
                         return c.typeArguments.map((e) => _render_ElementType(
@@ -14471,7 +14471,7 @@ class _Renderer_TopLevelContainer extends RendererBase<TopLevelContainer> {
                   renderVariable: (CT_ c, Property<CT_> self,
                           List<String> remainingNames) =>
                       self.renderSimpleVariable(
-                          c, remainingNames, 'Iterable<Container>'),
+                          c, remainingNames, 'List<Container>'),
                   renderIterable: (CT_ c, RendererBase<CT_> r,
                       List<MustachioNode> ast, StringSink sink) {
                     return c.publicClassesSorted.map((e) =>
@@ -14521,7 +14521,7 @@ class _Renderer_TopLevelContainer extends RendererBase<TopLevelContainer> {
                   renderVariable: (CT_ c, Property<CT_> self,
                           List<String> remainingNames) =>
                       self.renderSimpleVariable(
-                          c, remainingNames, 'Iterable<Enum>'),
+                          c, remainingNames, 'List<Enum>'),
                   renderIterable: (CT_ c, RendererBase<CT_> r,
                       List<MustachioNode> ast, StringSink sink) {
                     return c.publicEnumsSorted.map((e) =>
@@ -14533,7 +14533,7 @@ class _Renderer_TopLevelContainer extends RendererBase<TopLevelContainer> {
                   renderVariable: (CT_ c, Property<CT_> self,
                           List<String> remainingNames) =>
                       self.renderSimpleVariable(
-                          c, remainingNames, 'Iterable<Class>'),
+                          c, remainingNames, 'List<Class>'),
                   renderIterable: (CT_ c, RendererBase<CT_> r,
                       List<MustachioNode> ast, StringSink sink) {
                     return c.publicExceptionsSorted.map((e) =>
@@ -14558,7 +14558,7 @@ class _Renderer_TopLevelContainer extends RendererBase<TopLevelContainer> {
                   renderVariable: (CT_ c, Property<CT_> self,
                           List<String> remainingNames) =>
                       self.renderSimpleVariable(
-                          c, remainingNames, 'Iterable<ExtensionType>'),
+                          c, remainingNames, 'List<ExtensionType>'),
                   renderIterable: (CT_ c, RendererBase<CT_> r,
                       List<MustachioNode> ast, StringSink sink) {
                     return c.publicExtensionTypesSorted.map((e) =>
@@ -14583,7 +14583,7 @@ class _Renderer_TopLevelContainer extends RendererBase<TopLevelContainer> {
                   renderVariable: (CT_ c, Property<CT_> self,
                           List<String> remainingNames) =>
                       self.renderSimpleVariable(
-                          c, remainingNames, 'Iterable<Extension>'),
+                          c, remainingNames, 'List<Extension>'),
                   renderIterable: (CT_ c, RendererBase<CT_> r,
                       List<MustachioNode> ast, StringSink sink) {
                     return c.publicExtensionsSorted.map((e) =>
@@ -14608,7 +14608,7 @@ class _Renderer_TopLevelContainer extends RendererBase<TopLevelContainer> {
                   renderVariable: (CT_ c, Property<CT_> self,
                           List<String> remainingNames) =>
                       self.renderSimpleVariable(
-                          c, remainingNames, 'Iterable<ModelFunctionTyped>'),
+                          c, remainingNames, 'List<ModelFunctionTyped>'),
                   renderIterable: (CT_ c, RendererBase<CT_> r,
                       List<MustachioNode> ast, StringSink sink) {
                     return c.publicFunctionsSorted.map((e) =>
@@ -14633,7 +14633,7 @@ class _Renderer_TopLevelContainer extends RendererBase<TopLevelContainer> {
                   renderVariable: (CT_ c, Property<CT_> self,
                           List<String> remainingNames) =>
                       self.renderSimpleVariable(
-                          c, remainingNames, 'Iterable<Mixin>'),
+                          c, remainingNames, 'List<Mixin>'),
                   renderIterable: (CT_ c, RendererBase<CT_> r,
                       List<MustachioNode> ast, StringSink sink) {
                     return c.publicMixinsSorted.map((e) =>
@@ -14658,7 +14658,7 @@ class _Renderer_TopLevelContainer extends RendererBase<TopLevelContainer> {
                   renderVariable: (CT_ c, Property<CT_> self,
                           List<String> remainingNames) =>
                       self.renderSimpleVariable(
-                          c, remainingNames, 'Iterable<TopLevelVariable>'),
+                          c, remainingNames, 'List<TopLevelVariable>'),
                   renderIterable: (CT_ c, RendererBase<CT_> r,
                       List<MustachioNode> ast, StringSink sink) {
                     return c.publicPropertiesSorted.map((e) =>
@@ -14683,7 +14683,7 @@ class _Renderer_TopLevelContainer extends RendererBase<TopLevelContainer> {
                   renderVariable: (CT_ c, Property<CT_> self,
                           List<String> remainingNames) =>
                       self.renderSimpleVariable(
-                          c, remainingNames, 'Iterable<Typedef>'),
+                          c, remainingNames, 'List<Typedef>'),
                   renderIterable: (CT_ c, RendererBase<CT_> r,
                       List<MustachioNode> ast, StringSink sink) {
                     return c.publicTypedefsSorted.map((e) =>
diff --git a/lib/src/model/container.dart b/lib/src/model/container.dart
index 6466b8b0c0..6791e67839 100644
--- a/lib/src/model/container.dart
+++ b/lib/src/model/container.dart
@@ -105,7 +105,7 @@ abstract class Container extends ModelElement
       publicInstanceMethods.toList(growable: false)..sort();
 
   @nonVirtual
-  late final Iterable<Operator> declaredOperators =
+  late final List<Operator> declaredOperators =
       declaredMethods.whereType<Operator>().toList(growable: false);
 
   @override
diff --git a/lib/src/model/enum.dart b/lib/src/model/enum.dart
index 7fec25c6b4..a43b6987a8 100644
--- a/lib/src/model/enum.dart
+++ b/lib/src/model/enum.dart
@@ -48,8 +48,9 @@ class Enum extends InheritingContainer
       declaredFields.where((f) => f is! EnumField && f.isConst);
 
   @override
-  late final Iterable<Field> publicEnumValues =
-      model_utils.filterNonPublic(allFields).whereType<EnumField>();
+  late final List<Field> publicEnumValues = model_utils
+      .filterNonPublic(allFields.whereType<EnumField>())
+      .toList(growable: false);
 
   @override
   bool get hasPublicEnumValues => publicEnumValues.isNotEmpty;
diff --git a/lib/src/model/inheriting_container.dart b/lib/src/model/inheriting_container.dart
index b929164ea7..d37303423c 100644
--- a/lib/src/model/inheriting_container.dart
+++ b/lib/src/model/inheriting_container.dart
@@ -19,7 +19,7 @@ import 'package:meta/meta.dart';
 /// Note that [Constructor]s are not considered to be modifiers so a
 /// [hasModifiers] override is not necessary for this mixin.
 mixin Constructable on InheritingContainer {
-  late final Iterable<Constructor> constructors = element.constructors
+  late final List<Constructor> constructors = element.constructors
       .map((e) => modelBuilder.from(e, library) as Constructor)
       .toList(growable: false);
 
@@ -246,8 +246,9 @@ abstract class InheritingContainer extends Container
   }
 
   @override
-  late final Iterable<Method> declaredMethods =
-      element.methods.map((e) => modelBuilder.from(e, library) as Method);
+  late final List<Method> declaredMethods = element.methods
+      .map((e) => modelBuilder.from(e, library) as Method)
+      .toList(growable: false);
 
   @override
   late final List<TypeParameter> typeParameters = element.typeParameters
diff --git a/lib/src/model/library.dart b/lib/src/model/library.dart
index 4d3ba1c9d0..fed9a7a38d 100644
--- a/lib/src/model/library.dart
+++ b/lib/src/model/library.dart
@@ -102,7 +102,7 @@ class Library extends ModelElement
   /// documented with this library, but these ModelElements and names correspond
   /// to the defining library where each originally came from with respect
   /// to inheritance and reexporting.  Most useful for error reporting.
-  late final Iterable<String> allOriginalModelElementNames =
+  late final List<String> allOriginalModelElementNames =
       allModelElements.map((e) {
     if (e is GetterSetterCombo) {
       Accessor? getter;
@@ -142,13 +142,13 @@ class Library extends ModelElement
   Iterable<Class> get classes => allClasses.where((c) => !c.isErrorOrException);
 
   @override
-  late final Iterable<Extension> extensions = _exportedAndLocalElements
+  late final List<Extension> extensions = _exportedAndLocalElements
       .whereType<ExtensionElement>()
       .map((e) => modelBuilder.from(e, this) as Extension)
       .toList(growable: false);
 
   @override
-  late final Iterable<ExtensionType> extensionTypes = _exportedAndLocalElements
+  late final List<ExtensionType> extensionTypes = _exportedAndLocalElements
       .whereType<ExtensionTypeElement>()
       .map((e) => modelBuilder.from(e, this) as ExtensionType)
       .toList(growable: false);
@@ -331,16 +331,16 @@ class Library extends ModelElement
     // This code should not be used for Dart SDK libraries.
     assert(!element.source.uri.isScheme('dart'));
     var fullName = element.source.fullName;
-     if (!pathContext.isWithin(fullName, package.packagePath) &&
-         package.packagePath.contains('/google3/')) {
-       // In google3, `fullName` is specified as if the root of google3 was `/`.
-       // And `package.packagePath` contains the true google3 root.
-       var root = pathContext
-           .joinAll(pathContext.split(package.packagePath)..removeLast());
-       fullName = '$root$fullName';
-     }
-     var relativePath =
-         pathContext.relative(fullName, from: package.packagePath);
+    if (!pathContext.isWithin(fullName, package.packagePath) &&
+        package.packagePath.contains('/google3/')) {
+      // In google3, `fullName` is specified as if the root of google3 was `/`.
+      // And `package.packagePath` contains the true google3 root.
+      var root = pathContext
+          .joinAll(pathContext.split(package.packagePath)..removeLast());
+      fullName = '$root$fullName';
+    }
+    var relativePath =
+        pathContext.relative(fullName, from: package.packagePath);
     assert(relativePath.startsWith('lib${pathContext.separator}'));
     const libDirectoryLength = 'lib/'.length;
     return relativePath.substring(libDirectoryLength);
@@ -355,7 +355,7 @@ class Library extends ModelElement
 
   /// All variables ("properties") except constants.
   @override
-  late final Iterable<TopLevelVariable> properties =
+  late final List<TopLevelVariable> properties =
       _variables.where((v) => !v.isConst).toList(growable: false);
 
   @override
diff --git a/lib/src/model/package_graph.dart b/lib/src/model/package_graph.dart
index 640efdce76..71f7baf73a 100644
--- a/lib/src/model/package_graph.dart
+++ b/lib/src/model/package_graph.dart
@@ -631,7 +631,7 @@ class PackageGraph with CommentReferable, Nameable, ModelBuilder {
   }
 
   @visibleForTesting
-  late final Iterable<Library> libraries =
+  late final List<Library> libraries =
       packages.expand((p) => p.libraries).toList(growable: false)..sort();
 
   int get libraryCount => libraries.length;
@@ -905,7 +905,7 @@ class PackageGraph with CommentReferable, Nameable, ModelBuilder {
     return allElements;
   }
 
-  late final Iterable<ModelElement> allLocalModelElements = [
+  late final List<ModelElement> allLocalModelElements = [
     for (var library in _localLibraries) ...library.allModelElements
   ];
 
diff --git a/lib/src/model/top_level_container.dart b/lib/src/model/top_level_container.dart
index a5be369097..ba53ea710e 100644
--- a/lib/src/model/top_level_container.dart
+++ b/lib/src/model/top_level_container.dart
@@ -57,19 +57,19 @@ mixin TopLevelContainer implements Nameable {
   // TODO(jcollins-g):  Setting this type parameter to `Container` magically
   // fixes a number of type problems in the AOT compiler, but I am mystified as
   // to why that should be the case.
-  late final Iterable<Container> publicClassesSorted =
+  late final List<Container> publicClassesSorted =
       publicClasses.toList(growable: false)..sort();
 
   Iterable<Extension> get publicExtensions =>
       model_utils.filterNonPublic(extensions);
 
-  late final Iterable<Extension> publicExtensionsSorted =
+  late final List<Extension> publicExtensionsSorted =
       publicExtensions.toList(growable: false)..sort();
 
   Iterable<ExtensionType> get publicExtensionTypes =>
       model_utils.filterNonPublic(extensionTypes);
 
-  late final Iterable<ExtensionType> publicExtensionTypesSorted =
+  late final List<ExtensionType> publicExtensionTypesSorted =
       publicExtensionTypes.toList(growable: false)..sort();
 
   Iterable<TopLevelVariable> get publicConstants =>
@@ -80,34 +80,34 @@ mixin TopLevelContainer implements Nameable {
 
   Iterable<Enum> get publicEnums => model_utils.filterNonPublic(enums);
 
-  late final Iterable<Enum> publicEnumsSorted =
-      publicEnums.toList(growable: false)..sort();
+  late final List<Enum> publicEnumsSorted = publicEnums.toList(growable: false)
+    ..sort();
 
   Iterable<Class> get _publicExceptions =>
       model_utils.filterNonPublic(exceptions);
 
-  late final Iterable<Class> publicExceptionsSorted =
+  late final List<Class> publicExceptionsSorted =
       _publicExceptions.toList(growable: false)..sort();
 
   Iterable<ModelFunctionTyped> get publicFunctions =>
       model_utils.filterNonPublic(functions!);
 
-  late final Iterable<ModelFunctionTyped> publicFunctionsSorted =
+  late final List<ModelFunctionTyped> publicFunctionsSorted =
       publicFunctions.toList(growable: false)..sort();
 
   Iterable<Mixin> get publicMixins => model_utils.filterNonPublic(mixins);
 
-  late final Iterable<Mixin> publicMixinsSorted =
+  late final List<Mixin> publicMixinsSorted =
       publicMixins.toList(growable: false)..sort();
 
   Iterable<TopLevelVariable> get publicProperties =>
       model_utils.filterNonPublic(properties);
 
-  late final Iterable<TopLevelVariable> publicPropertiesSorted =
+  late final List<TopLevelVariable> publicPropertiesSorted =
       publicProperties.toList(growable: false)..sort();
 
   Iterable<Typedef> get publicTypedefs => model_utils.filterNonPublic(typedefs);
 
-  late final Iterable<Typedef> publicTypedefsSorted =
+  late final List<Typedef> publicTypedefsSorted =
       publicTypedefs.toList(growable: false)..sort();
 }