docs: public Record getSubRecord()
      {
          if (m_recDependent == null)
              m_recDependent = this.createSubRecord();
          if (m_recDependent != null)
          {
              if (m_recDependent.getListener(SubFileFilter.class.getName()) == null)
                  m_recDependent.addListener(new SubFileFilter(this.getOwner()));
          }
          return m_recDependent;
      }