Method constructor

packages/firebase-firestore/index.ios.ts:1063–1067

(seconds: number, nanoseconds: number, native = false)

	_native: FIRTimestamp;

	constructor(seconds: number, nanoseconds: number, native = false) {
		if (!native) {
			this._native = FIRTimestamp.timestampWithSecondsNanoseconds(seconds, nanoseconds);
		}
	}

	static fromNative(timestamp: FIRTimestamp) {
		if (timestamp instanceof FIRTimestamp) {