code: public Tag createTag(Object projectIdOrPath, String tagName, String ref) throws GitLabApiException {
          return (createTag(projectIdOrPath, tagName, ref, null, (String)null));
      }
docs: Creates a tag on a particular ref of the given project.
  
  <pre><code>GitLab Endpoint: POST /projects/:id/repository/tags</code></pre>
  
  @param projectIdOrPath id, path of the project, or a Project instance holding the project ID or path
  @param tagName The name of the tag Must be unique for the project
  @param ref the git ref to place the tag on
  @return a Tag instance containing info on the newly created tag
  @throws GitLabApiException if any exception occurs