code: public JobBuilder withIdentity (final String name, final String group)
    {
      m_aKey = new JobKey (name, group);
      return this;
    }
docs: Use a <code>JobKey</code> with the given name and group to identify the
  JobDetail.
  <p>
  If none of the 'withIdentity' methods are set on the JobBuilder, then a
  random, unique JobKey will be generated.
  </p>
  
  @param name
  the name element for the Job's JobKey
  @param group
  the group element for the Job's JobKey
  @return the updated JobBuilder
  @see JobKey
  @see IJobDetail#getKey()