A function tag is a public identifier of a method that can be mapped to a key binding by the control's InputMap.

Example

Example:

public class RichTextArea extends Control {
    public static class Tags {
        // Deletes the symbol before the caret.
        public static final FunctionTag BACKSPACE = new FunctionTag();
        // Copies selected text to the clipboard.
        public static final FunctionTag COPY = new FunctionTag();
        // Cuts selected text and places it to the clipboard.
        public static final FunctionTag CUT = new FunctionTag();
        ...