code: def test_conf_raises_for_unaccessible_arguments():
      @ConfigScope
      def conf_scope(a, b, c):
          answer = 42
  
      with pytest.raises(KeyError):
          conf_scope(preset={"a": 1}, fallback={"b": 2})
  
imports: import pytest
  import sacred.optional
  from sacred.config.config_scope import ConfigScope, dedent_function_body, dedent_line, get_function_body, is_empty_or_comment
  from sacred.config.custom_containers import DogmaticDict, DogmaticList
label_desc: Use image node_id 20 for calling a global function with example usage: test_conf_raises_for_unaccessible_arguments() without return types