code: public FormInputHandler by(final By theBy) {
  		Fields fields = new Fields(this);
  		fields.finder = fields.finder.by(theBy);
  		return new FormInputHandler(fields);
  	}
docs: Creates a new {@link FormInputHandler} based on this {@link FormInputHandler} using the specified {@link By}.
  
  @param theBy
  locates the element to operate on
  @return the new {@link FormInputHandler} instance