code: func (c *PI) DescribeDimensionKeys(input *DescribeDimensionKeysInput) (*DescribeDimensionKeysOutput, error) {
  	req, out := c.DescribeDimensionKeysRequest(input)
  	return out, req.Send()
  }
docs: // DescribeDimensionKeys API operation for AWS Performance Insights.
  //
  // For a specific time period, retrieve the top N dimension keys for a metric.
  //
  // Returns awserr.Error for service API and SDK errors. Use runtime type assertions
  // with awserr.Error's Code and Message methods to get detailed information about
  // the error.
  //
  // See the AWS API reference guide for AWS Performance Insights's
  // API operation DescribeDimensionKeys for usage and error information.
  //
  // Returned Error Codes:
  //   * ErrCodeInvalidArgumentException "InvalidArgumentException"
  //   One of the arguments provided is invalid for this request.
  //
  //   * ErrCodeInternalServiceError "InternalServiceError"
  //   The request failed due to an unknown error.
  //
  //   * ErrCodeNotAuthorizedException "NotAuthorizedException"
  //   The user is not authorized to perform this request.
  //
  // See also, https://docs.aws.amazon.com/goto/WebAPI/pi-2018-02-27/DescribeDimensionKeys