docs: public String[] getPropertyNames(String pstrSection)
      {
          String[]   arrRet = null;
          INISection objSec = null;
  
          objSec = (INISection) this.mhmapSections.get(pstrSection);
          if (objSec != null)
          {
              arrRet = objSec.getPropNames();
              objSec = null;
          }
          return arrRet;
      }