code: @Nonnull
    public TriggerBuilder <T> usingJobData (final String dataKey, final String value)
    {
      m_aJobDataMap.put (dataKey, value);
      return this;
    }
docs: Add the given key-value pair to the Trigger's {@link JobDataMap}.
  
  @return the updated TriggerBuilder
  @see ITrigger#getJobDataMap()