code: public boolean checkForceFieldType(String ffname) {
          boolean check = false;
          for (int i = 0; i < fftypes.length; i++) {
              if (fftypes[i].equals(ffname)) {
                  check = true;
                  break;
              }
          }
          if (!check) {
              //			logger.debug("FFError:checkForceFieldType> Unknown forcefield:" + ffname + "Take default:"+ffName);
              return false;
          }
          return true;
      }
docs: Sets the forceFieldType attribute of the ForceFieldConfigurator object
  
  @param  ffname  The new forceFieldType name