docs: def get_body_example(cls, operation):
          """ Get example for body parameter example by operation
  
          :param Operation operation: operation object
          """
          path = "#/paths/'{0.path}'/{0.method}/parameters/{name}".format(
              operation, name=operation.body.name or 'body')
          return cls.get_example_by_schema(operation.body, paths=[path])