src/vs/editor/browser/widget/diffReview.ts/DiffReviewPrev/constructor
class DiffReviewPrev:	constructor() {
		super({
			id: 'editor.action.diffReview.prev',
			label: nls.localize('editor.action.diffReview.prev', "Go to Previous Difference"),
			alias: 'Go to Previous Difference',
			precondition: ContextKeyExpr.has('isInDiffEditor'),
			kbOpts: {
				kbExpr: null,
				primary: KeyMod.Shift | KeyCode.F7,
				weight: KeybindingWeight.EditorContrib
			}
		});
	}