Update Loader docs (#3352)

Author: ziima

docs/changelog/3352.doc.rst

@@ -0,0 +1 @@
+Update Loader docs - by :user:ziima

docs/plugins_api.rst

@@ -63,6 +63,9 @@ config
 .. autoclass:: tox.config.loader.api.Loader
    :members:
 
+.. autoclass:: tox.config.loader.memory.MemoryLoader
+   :members:
+
 .. autoclass:: tox.config.loader.convert.Convert
    :members:
 

src/tox/config/loader/api.py

@@ -77,7 +77,10 @@ def copy(self) -> ConfigLoadArgs:
 
 
 class Loader(Convert[T]):
-    """Loader loads a configuration value and converts it."""
+    """Loader loads configuration values and converts it.
+
+    :param overrides: A list of overrides to be applied.
+    """
 
     def __init__(self, section: Section, overrides: list[Override]) -> None:
         self._section = section
@@ -88,6 +91,7 @@ def __init__(self, section: Section, overrides: list[Override]) -> None:
 
     @property
     def section(self) -> Section:
+        """Return the section of the configuration from where the values are extracted."""
         return self._section
 
     @abstractmethod

src/tox/config/loader/memory.py

@@ -14,6 +14,8 @@
 
 
 class MemoryLoader(Loader[Any]):
+    """Loads configuration directly from data in memory."""
+
     def __init__(self, **kwargs: Any) -> None:
         super().__init__(Section(prefix="<memory>", name=str(id(self))), [])
         self.raw: dict[str, Any] = {**kwargs}