code: def export() -> None:
      node = onnx.helper.make_node("Mish", inputs=["X"], outputs=["Y"])
  
      input_data = np.linspace(-10, 10, 10000, dtype=np.float32)
  
      # Calculate expected output data
      expected_output = input_data * np.tanh(
          np.log1p(np.exp(input_data))
      )
  
      expect(
          node,
          inputs=[input_data],
          outputs=[expected_output],
          name="test_mish",
      )
  
imports: import numpy
  import onnx
  from onnx.backend.test.case.base import Base
  from onnx.backend.test.case.node import expect
label_desc: Use image node_id 1 for calling the Mish obj's underlying member method code with example usage: obj.export() without return types