code: public FormInputHandler selected(final Boolean theSelected) {
  		Fields fields = new Fields(this);
  		fields.finder = fields.finder.selected(theSelected);
  		return new FormInputHandler(fields);
  	}
docs: Creates a new {@link FormInputHandler} based on this {@link FormInputHandler} that requires elements to be selected.
  
  @param theSelected
  restricts the {@code selected} status of the element
  @return the new {@link FormInputHandler} instance