private void SetMockLocation()
        {
            var mockLocation = new Location(LocationManager.GpsProvider);

            mockLocation.Longitude = Convert.ToDouble(latEntry.Text);
            mockLocation.Latitude  = Convert.ToDouble(lngEntry.Text);
            var mockTask = fusedLocationProviderClient.SetMockLocation(mockLocation);

            mockTask.AddOnSuccessListener(new MockLocationSuccessListener(this));
            mockTask.AddOnFailureListener(new MockLocationFailureListener(this));
        }