src/vs/editor/contrib/find/findController.ts/PreviousMatchFindAction/constructor
class PreviousMatchFindAction:	constructor() {
		super({
			id: FIND_IDS.PreviousMatchFindAction,
			label: nls.localize('findPreviousMatchAction', "Find Previous"),
			alias: 'Find Previous',
			precondition: undefined,
			kbOpts: [{
				kbExpr: EditorContextKeys.focus,
				primary: KeyMod.Shift | KeyCode.F3,
				mac: { primary: KeyMod.CtrlCmd | KeyMod.Shift | KeyCode.KEY_G, secondary: [KeyMod.Shift | KeyCode.F3] },
				weight: KeybindingWeight.EditorContrib
			}, {
				kbExpr: ContextKeyExpr.and(EditorContextKeys.focus, CONTEXT_FIND_INPUT_FOCUSED),
				primary: KeyMod.Shift | KeyCode.Enter,
				weight: KeybindingWeight.EditorContrib
			}
			]
		});
	}