src/vs/base/common/keybindingParser.ts/KeybindingParser/parseKeybinding
class KeybindingParser:	public static parseKeybinding(input: string, OS: OperatingSystem): Keybinding | null {
		if (!input) {
			return null;
		}

		const parts: SimpleKeybinding[] = [];
		let part: SimpleKeybinding;

		do {
			[part, input] = this.parseSimpleKeybinding(input);
			parts.push(part);
		} while (input.length > 0);
		return new ChordKeybinding(parts);
	}