Few Updates to Prep for SSoT Refactor

diffsync/__init__.py

@@ -16,6 +16,7 @@
 """
 
 import sys
+from copy import deepcopy
 from inspect import isclass
 from typing import (
     Any,
@@ -480,6 +481,13 @@ def __init_subclass__(cls) -> None:
             if not isclass(value) or not issubclass(value, DiffSyncModel):
                 raise AttributeError(f'top_level references attribute "{name}" but it is not a DiffSyncModel subclass!')
 
+    def __new__(cls, **kwargs):  # type: ignore[no-untyped-def]
+        """Document keyword arguments that were used to initialize Adapter."""
+        meta_kwargs = deepcopy(kwargs)
+        instance = super().__new__(cls)
+        instance._meta_kwargs = meta_kwargs
+        return instance
+
     def __str__(self) -> StrType:
         """String representation of an Adapter."""
         if self.type != self.name:

diffsync/utils.py

@@ -16,7 +16,7 @@
 """
 
 from collections import OrderedDict
-from typing import Iterator, List, Dict, Optional, TypeVar, Callable, Generic
+from typing import Callable, Dict, Generic, Iterator, List, Optional, TypeVar
 
 SPACE = "    "
 BRANCH = "│   "
@@ -44,7 +44,7 @@ def symmetric_difference(lst1: List[T], lst2: List[T]) -> List[T]:
 class OrderedDefaultDict(OrderedDict, Generic[K, V]):
     """A combination of collections.OrderedDict and collections.DefaultDict behavior."""
 
-    def __init__(self, dict_type: Callable[[], V]) -> None:
+    def __init__(self, dict_type: Callable[[], V] = dict) -> None:  # type: ignore[assignment]
         """Create a new OrderedDefaultDict."""
         self.factory = dict_type
         super().__init__(self)