MapBox marker pin problem

There is a problem with MapBox marker
when I try to add some bitmap or BitmapDescriptorFactory
algorithm ignores that and show standard pin

Start by locating the MapBox marker implementation and the code that handles bitmap or BitmapDescriptorFactory marker icons. Reproduce the issue with a custom bitmap and compare it with the standard pin path. Done means a supplied bitmap is displayed instead of the default marker pin.

Written by the indexing model from the issue text.