Method getHeading

src/google-maps/google-map/google-map.ts:412–415

* See * https://developers.google.com/maps/documentation/javascript/reference/map#Map.getHeading

()

   * https://developers.google.com/maps/documentation/javascript/reference/map#Map.getHeading
   */
  getHeading(): number | undefined {
    this._assertInitialized();
    return this.googleMap.getHeading();
  }

  /**
   * See