code: public static boolean isValidBranchName(String branch, String prefix) throws Exception {
      if(StringUtils.isNotBlank(prefix) && StringUtils.isNotBlank(branch)) {
        if(StringUtils.startsWithIgnoreCase(branch, prefix + "-")) {
          return true;
        } else {
          System.err.println("Branch name must start with prefix \""+prefix+"-\".");
        }
      } else {
        return true;
      }
      return false;
    }
docs: Validates the branch name that will be sent to the given prefix.
  
  @param branch
  @param prefix
  @return