code: public final void put(final String pNm, final String pVal) {
      if (isId(pNm)) {
        if (this.idStrs == null) {
          this.idStrs = new HashMap<String, String>();
        }
        this.idStrs.put(pNm, pVal);
      } else {
        if (this.strs == null) {
          this.strs = new HashMap<String, String>();
        }
        this.strs.put(pNm, pVal);
      }
    }
docs: <p>Put column with String val.</p>
  @param pNm column name
  @param pVal column val