code: def test_make_grouping_by_key_dict(dict_grouping_size):
      grouping, size = dict_grouping_size
      source = make_key_source(size)
      result = make_grouping_by_key(grouping, source)
      expected = {k: source[v] for k, v in grouping.items()}
      assert expected == result
  
imports: from dash.dependencies import Input
  from dash._grouping import flatten_grouping, make_grouping_by_index, grouping_len, map_grouping, make_grouping_by_key, validate_grouping, SchemaTypeValidationError, SchemaLengthValidationError, SchemaKeysValidationError
  from fixtures import scalar_grouping_size, list_grouping_size, dict_grouping_size, mixed_grouping_size
  import string
  import pytest
label_desc: Use image node_id 19 for calling a global function with example usage: test_make_grouping_by_key_dict(dict_grouping_size) without return types