text: public String toString() {StringBuilder sb = new StringBuilder();sb.append(getClass().getName()).append(" [CRN");sb.append(" rowIx=").append(field_3_row_index);sb.append(" firstColIx=").append(field_2_first_column_index);sb.append(" lastColIx=").append(field_1_last_column_index);sb.append("]");return sb.toString();}