code: def from_body(self, param_name, schema):
          
  
          schema = schema() if isclass(schema) else schema
  
          def decorator(func):
              @functools.wraps(func)
              def wrapper(*args, **kwargs):
                  kwargs[param_name] = self.__parse_body(schema)
                  return func(*args, **kwargs)
              return wrapper
          return decorator
docs: A decorator that converts the request body into a function parameter based on the specified schema.
  
          :param param_name: The parameter which receives the argument.
          :param schema: The schema class or instance used to deserialize the request body toa Python object.
          :return: A function