Bug 287454 [KeyBindings] F16-F19 unusable as shortcut keys in General -> Keys
bundles/org.eclipse.jface/src/org/eclipse/jface/bindings/keys/IKeyLookup.java
public int getAlt();
	/**
	 * Returns the integer representation of the COMMAND key.
	 * 
	 * @return The COMMAND key
	 */
	public int getCommand();
	/**
	 * Returns the integer representation of the CTRL key.
	 * 
	 * @return The CTRL key
	 */
	public int getCtrl();
	/**
	 * Returns the integer representation of the SHIFT key.
	 * 
	 * @return The SHIFT key
	 */
	public int getShift();
	/**
	 * Returns whether the given key is a modifier key.
	 * 
	 * @param key
	 *            The integer value of the key to check.
	 * @return <code>true</code> if the key is one of the modifier keys;
	 *         <code>false</code> otherwise.
	 */
	public boolean isModifierKey(int key);
}