Method constructor

packages/firebase-firestore/index.ios.ts:935–940

(fieldNames: string[], native = false)

	_native: FIRFieldPath;

	constructor(fieldNames: string[], native = false) {
		if (!native) {
			this._native = FIRFieldPath.alloc().initWithFields(fieldNames);
			this._addToMap();
		}
	}

	private _addToMap() {
		fp_refs.set(this.native.description, new WeakRef(this._native));