code: func (c *Glacier) PurchaseProvisionedCapacity(input *PurchaseProvisionedCapacityInput) (*PurchaseProvisionedCapacityOutput, error) {
  	req, out := c.PurchaseProvisionedCapacityRequest(input)
  	return out, req.Send()
  }
docs: // PurchaseProvisionedCapacity API operation for Amazon Glacier.
  //
  // This operation purchases a provisioned capacity unit for an AWS account.
  //
  // 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 Amazon Glacier's
  // API operation PurchaseProvisionedCapacity for usage and error information.
  //
  // Returned Error Codes:
  //   * ErrCodeInvalidParameterValueException "InvalidParameterValueException"
  //   Returned if a parameter of the request is incorrectly specified.
  //
  //   * ErrCodeMissingParameterValueException "MissingParameterValueException"
  //   Returned if a required header or parameter is missing from the request.
  //
  //   * ErrCodeLimitExceededException "LimitExceededException"
  //   Returned if the request results in a vault or account limit being exceeded.
  //
  //   * ErrCodeServiceUnavailableException "ServiceUnavailableException"
  //   Returned if the service cannot complete the request.
  //