code: public NegateMultiPos<S, Integer, Integer> before(int rightIndex) {
  		return new NegateMultiPos<S, Integer, Integer>(0, rightIndex) {
  
  			@Override protected S result() {
  				return aQueue('J', left, right, pos, position, null, plusminus, filltgt);
  			}
  		};
  	}
docs: Sets the substring in the beginning and given right index as the search string
  
  @see Indexer#before(int)
  @param rightIndex
  @return