code: public GitlabLabel createLabel(Serializable projectId, GitlabLabel label)
              throws IOException {
          String name = label.getName();
          String color = label.getColor();
          return createLabel(projectId, name, color);
      }
docs: Creates a new label.
  
  @param projectId The ID of the project containing the label.
  @param label     The label to create.
  @return The newly created label.