docs: public void init(Record record, String thisFileFieldName, BaseField fldThisFile, String thisFileFieldName2, BaseField fldThisFile2, String thisFileFieldName3, BaseField fldThisFile3)
      {
          super.init(record);
          this.thisFileFieldName = thisFileFieldName;
          m_fldThisFile = fldThisFile;
          this.thisFileFieldName2 = thisFileFieldName2;
          m_fldThisFile2 = fldThisFile2;
          this.thisFileFieldName3 = thisFileFieldName3;
          m_fldThisFile3 = fldThisFile3;
          m_bInitialKey = true;
          m_bEndKey = true;
      }