-(IBAction)trash:(id)sender {
    NSLog(@"put to trash");
    MyPointAnnotation *thisAnnotation = (MyPointAnnotation*)[relatedAnnotationView annotation];
    [thisAnnotation setFlaggedForDeletion:YES];  // deletion is managed in delegate didDeselect
    [thisAnnotation.pointMetadata->mapView deselectAnnotation:thisAnnotation animated:NO];
}

-(void) mapView:(MKMapView *)theMapView didDeselectAnnotationView:(nonnull MKAnnotationView *)view {
    if (customCalloutView) {
        [customCalloutView removeFromSuperview];
    }

    if([(MyPointAnnotation*)[view annotation] flaggedForDeletion]){
        [view removeFromSuperview];
        [theMapView removeAnnotation:[view annotation]];
    }
}