code: public Observable<ServiceResponse<Tag>> getTagWithServiceResponseAsync(UUID projectId, UUID tagId, GetTagOptionalParameter getTagOptionalParameter) {
          if (projectId == null) {
              throw new IllegalArgumentException("Parameter projectId is required and cannot be null.");
          }
          if (tagId == null) {
              throw new IllegalArgumentException("Parameter tagId is required and cannot be null.");
          }
          if (this.client.apiKey() == null) {
              throw new IllegalArgumentException("Parameter this.client.apiKey() is required and cannot be null.");
          }
          final UUID iterationId = getTagOptionalParameter != null ? getTagOptionalParameter.iterationId() : null;
  
          return getTagWithServiceResponseAsync(projectId, tagId, iterationId);
      }
docs: Get information about a specific tag.
  
  @param projectId The project this tag belongs to
  @param tagId The tag id
  @param getTagOptionalParameter the object representing the optional parameters to be set before calling this API
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the Tag object