code: def test_multiline_str_is_literal_block():
      actual = yamlx.dump({"hello": "abc", "multiline": "abc\ndef"})
      expected = """hello: abc
  multiline: |-
    abc
    def
  """
      assert actual == expected
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_multiline_str_is_literal_block() without return types