src/vs/editor/contrib/wordPartOperations/wordPartOperations.ts/CursorWordPartLeft/constructor
class CursorWordPartLeft:	constructor() {
		super({
			inSelectionMode: false,
			wordNavigationType: WordNavigationType.WordStart,
			id: 'cursorWordPartLeft',
			precondition: undefined,
			kbOpts: {
				kbExpr: EditorContextKeys.textInputFocus,
				primary: 0,
				mac: { primary: KeyMod.WinCtrl | KeyMod.Alt | KeyCode.LeftArrow },
				weight: KeybindingWeight.EditorContrib
			}
		});
	}