docs: public void setOwner(ListenerOwner owner)
      {
          super.setOwner(owner);
          if (owner != null)
          {
              if (m_fldValue1 != null)
                  if (m_fldValue1.getRecord() != this.getOwner().getRecord())
                      m_fldValue1.addListener(new FieldRemoveBOnCloseHandler(this));      // Not same file, if target file closes, remove this listener!
              if (m_fldValue2 != null)
                  if (m_fldValue2.getRecord() != this.getOwner().getRecord())
                  if (m_fldValue2.getRecord() != m_fldValue1.getRecord())
                      m_fldValue2.addListener(new FieldRemoveBOnCloseHandler(this));      // Not same file, if target file closes, remove this listener!
          }
      }