code: public List<CommitComment> getCommitComments(Integer projectId, String sha) throws IOException {
  
          String tailUrl = GitlabProject.URL + "/" + sanitizeProjectId(projectId) + "/repository/commits/" + sha + CommitComment.URL;
  
          return Arrays.asList(retrieve().to(tailUrl, CommitComment[].class));
      }
docs: Get the comments of a commit
  
  @param projectId (required) - The ID of a project
  @param sha       (required) - The name of a repository branch or tag or if not given the default branch
  @return A CommitComment
  @throws IOException on gitlab api call error
  @see <a href="http://doc.gitlab.com/ce/api/commits.html#post-comment-to-commit">http://doc.gitlab.com/ce/api/commits.html#post-comment-to-commit</a>