docs: public Script getSubScript()
      {
          if (m_recSubScript == null)
          {
              RecordOwner recordOwner = this.findRecordOwner();
              m_recSubScript = new Script(recordOwner);
              recordOwner.removeRecord(m_recSubScript);
              m_recSubScript.addListener(new SubFileFilter(this));
          }
          return m_recSubScript;
      }