Thank you for the good suggestion.
The next version of Online Maps will contain this.
I suggest replacing the current SetDraggable method with the following which will maintain compatibility.
public bool IsDraggable {
get; private set;
}
public void SetDraggable(bool value = true)
{
if (IsDraggable == value) {
return;
}
IsDraggable = value;
if (value) {
OnPress += OnMarkerPress;
} else {
OnPress -= OnMarkerPress;
}
}