revert collections change

meltano · Feb 15, 2024 · dbdd011 · dbdd011
1 parent 3a3532a
commit dbdd011
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/singer_sdk/helpers/_flattening.py b/singer_sdk/helpers/_flattening.py
@@ -2,6 +2,7 @@
 
 from __future__ import annotations
 
+import collections
 import itertools
 import re
 import typing as t
@@ -419,7 +420,7 @@ def _flatten_record(
     items: list[tuple[str, t.Any]] = []
     for k, v in record_node.items():
         new_key = flatten_key(k, parent_key, separator)
-        if isinstance(v, t.MutableMapping) and (
+        if isinstance(v, collections.abc.MutableMapping) and (
             (flattened_schema and new_key not in flattened_schema.get("properties", {}))
             or (not flattened_schema and level < max_level)
         ):