code: @Override
      public GetTagsResult getTags(GetTagsRequest request) {
          request = beforeClientExecution(request);
          return executeGetTags(request);
      }
docs: <p>
  Queries for available tag keys and tag values for a specified period. You can search the tag values for an
  arbitrary string.
  </p>
  
  @param getTagsRequest
  @return Result of the GetTags operation returned by the service.
  @throws LimitExceededException
  You made too many calls in a short period of time. Try again later.
  @throws BillExpirationException
  The requested report expired. Update the date interval and try again.
  @throws DataUnavailableException
  The requested data is unavailable.
  @throws InvalidNextTokenException
  The pagination token is invalid. Try again without a pagination token.
  @throws RequestChangedException
  Your request parameters changed between pages. Try again with the old parameters or without a pagination
  token.
  @sample AWSCostExplorer.GetTags
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/ce-2017-10-25/GetTags" target="_top">AWS API
  Documentation</a>