code: def make_schema_with_nones(grouping):
      """
      Create a grouping by replacing all grouping scalars values with None
      """
      return map_grouping(lambda _: None, grouping)
  
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 22 for calling a global function with example usage: make_schema_with_nones(grouping) and returns: map_grouping