Pass output as input parameter when chaining Observables
IllegalArgumentException: No view found for id 0x7f0d008b (*:id/map) for fragment SupportMapFragment
Duplicate id 0x7f0d008a, tag null, or parent id 0xffffffff with another fragment for com.google.android.gms.maps.SupportMapFragment
Hack DefaultClusterRenderer.
Use LatLngBounds.Builder and hack DefaultClusterRenderer.