code: @Nonnull
    public JDK8TriggerBuilder <T> forJob (final String jobName, final String jobGroup)
    {
      m_aJobKey = new JobKey (jobName, jobGroup);
      return this;
    }
docs: Set the identity of the Job which should be fired by the produced Trigger -
  a <code>JobKey</code> will be produced with the given name and group.
  
  @param jobName
  the name of the job to fire.
  @param jobGroup
  the group of the job to fire.
  @return the updated JDK8TriggerBuilder
  @see ITrigger#getJobKey()