docs: public BaseField getFieldCopy()
      {
          try   {
              if (m_fldCopy == null)
                  m_fldCopy = (BaseField)this.getOwner().clone();     // Make a copy
          } catch (CloneNotSupportedException ex)   {
              m_fldCopy = null;
          }
          return m_fldCopy;
      }