code: def field2parameter(self, field, name="body", default_in="body"):
          
          location = field.metadata.get("location", None)
          prop = self.field2property(field)
          return self.property2parameter(
              prop,
              name=name,
              required=field.required,
              multiple=isinstance(field, marshmallow.fields.List),
              location=location,
              default_in=default_in,
          )
docs: Return an OpenAPI parameter as a `dict`, given a marshmallow
          :class:`Field <marshmallow.Field>`.
  
          https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#parameterObject