docs: def validate_capacity(capacity):
      """Validate ScalingConfiguration capacity for serverless DBCluster"""
  
      if capacity not in VALID_SCALING_CONFIGURATION_CAPACITIES:
          raise ValueError(
              "ScalingConfiguration capacity must be one of: {}".format(
                  ", ".join(map(
                      str,
                      VALID_SCALING_CONFIGURATION_CAPACITIES
                  ))
              )
          )
      return capacity