src/vs/workbench/electron-sandbox/actions/windowActions.ts/CloseWindowAction/constructor
class CloseWindowAction:	constructor() {
		super({
			id: CloseWindowAction.ID,
			title: {
				value: localize('closeWindow', "Close Window"),
				mnemonicTitle: localize({ key: 'miCloseWindow', comment: ['&& denotes a mnemonic'] }, "Clos&&e Window"),
				original: 'Close Window'
			},
			f1: true,
			keybinding: {
				weight: KeybindingWeight.WorkbenchContrib,
				mac: { primary: KeyMod.CtrlCmd | KeyMod.Shift | KeyCode.KeyW },
				linux: { primary: KeyMod.Alt | KeyCode.F4, secondary: [KeyMod.CtrlCmd | KeyMod.Shift | KeyCode.KeyW] },
				win: { primary: KeyMod.Alt | KeyCode.F4, secondary: [KeyMod.CtrlCmd | KeyMod.Shift | KeyCode.KeyW] }
			},
			menu: {
				id: MenuId.MenubarFileMenu,
				group: '6_close',
				order: 4
			}
		});
	}