code: public WebElementFinder selected(final Boolean theSelected) {
  		Fields fields = new Fields(this);
  		fields.selected = theSelected;
  		return new WebElementFinder(fields);
  	}
docs: Creates an new {@link WebElementFinder} based on this {@link WebElementFinder} restricting the selected status of elements.
  This method should only be called if elements are indeed selectable, such as checkboxes, options in a select, and radio
  buttons.
  
  @param theSelected
  {@code true} if elements must be selected, {@code false} if elements must not be selected
  @return the new {@link WebElementFinder} instance
  @see WebElement#isSelected()