input_type signature(object = "MethodDescriptor"): the Descriptor of the input type of the method
INPUT_TYPEsignature(object = "MethodDescriptor"):该方法的输入类型的描述符
output_type signature(object = "MethodDescriptor"): the Descriptor of the output type of the method
OUTPUT_TYPE signature(object = "MethodDescriptor"):输出类型描述符的方法