code: def test_getitem_non_existent_typeset():
      with pytest.raises(KeyError):
          datashape.typesets.registry["footypeset"]
  
file_path: datashader/datashader/datashape/tests/test_typeset.py
imports: from datashader import datashape
  import pytest
label_desc: Use image node_id 6 for calling a global function with example usage: test_getitem_non_existent_typeset() without return types