chore: add deprecated function to ensure backwards compatibility

Author: evakravi

src/sagemaker/jumpstart/accessors.py

@@ -13,6 +13,8 @@
 """This module contains accessors related to SageMaker JumpStart."""
 from __future__ import absolute_import
 from typing import Any, Dict, List, Optional
+
+from sagemaker.deprecations import deprecated
 from sagemaker.jumpstart.types import JumpStartModelHeader, JumpStartModelSpecs
 from sagemaker.jumpstart import cache
 from sagemaker.jumpstart.constants import JUMPSTART_DEFAULT_REGION_NAME
@@ -166,3 +168,21 @@ def reset_cache(cache_kwargs: Dict[str, Any] = None, region: Optional[str] = Non
         """
         cache_kwargs_dict = {} if cache_kwargs is None else cache_kwargs
         JumpStartModelsAccessor.set_cache_kwargs(cache_kwargs_dict, region)
+
+    @staticmethod
+    @deprecated()
+    def get_manifest(
+        cache_kwargs: Optional[Dict[str, Any]] = None, region: Optional[str] = None
+    ) -> List[JumpStartModelHeader]:
+        """Return entire JumpStart models manifest.
+        Raises:
+            ValueError: If region in `cache_kwargs` is inconsistent with `region` argument.
+        Args:
+            cache_kwargs (Dict[str, Any]): Optional. Cache kwargs to use.
+                (Default: None).
+            region (str): Optional. The region to use for the cache.
+                (Default: None).
+        """
+        cache_kwargs_dict: Dict[str, Any] = {} if cache_kwargs is None else cache_kwargs
+        JumpStartModelsAccessor.set_cache_kwargs(cache_kwargs_dict, region)
+        return JumpStartModelsAccessor._cache.get_manifest()  # type: ignore