code: @Override
      public void registerUDF(Collection.Key key, UDF udf) throws ApplicationException {
  	registerUDF(key, (UDFPlus) udf, useShadow, false);
      }
docs: /*
  public void reg(Collection.Key key, UDFPlus udf) throws ApplicationException { registerUDF(key,
  udf,useShadow,false); } public void reg(String key, UDFPlus udf) throws ApplicationException {
  registerUDF(KeyImpl.init(key), udf,useShadow,false); }