src/vs/base/common/keybindings.ts/ChordKeybinding/equals
class ChordKeybinding:	public equals(other: ChordKeybinding | null): boolean {
		if (other === null) {
			return false;
		}
		if (this.parts.length !== other.parts.length) {
			return false;
		}
		for (let i = 0; i < this.parts.length; i++) {
			if (!this.parts[i].equals(other.parts[i])) {
				return false;
			}
		}
		return true;
	}