feat: provide helper func to find objs with schema key within data in…

…stance

Test for the helper func is included in this
commit as well

dandischema/tests/test_utils.py

@@ -1,4 +1,4 @@
-from typing import Dict, List, Optional, Union
+from typing import Any, Dict, List, Optional, Union
 
 import pytest
 
@@ -232,6 +232,8 @@ def test_sanitize_value() -> None:
         ),
     ],
 )
-def test_find_objs_parametrized(instance, schema_key, expected):
+def test_find_objs_parametrized(
+    instance: Any, schema_key: str, expected: list[dict]
+) -> None:
     result = find_objs(instance, schema_key)
     assert result == expected

dandischema/utils.py

@@ -160,6 +160,6 @@ def find_objs_(data: Any) -> None:
         else:
             return
 
-    objs = []
+    objs: list[dict] = []
     find_objs_(instance)
     return objs