FlutterMap : Obx wrapping throwing error

[RageshAntony]

I am using FlutterMap (https://github.com/fleaflet/flutter_map)

When wrapping FlutterMap widget with Obx , I am getting this error :

[Get] the improper use of a GetX has been detected. 
      You should only use GetX or Obx for the specific widget that will be updated.

Why ?

I am using .obs variables inside FlutterMap widget , but till throwing error . Why? (FlutterMap is the only widget here , others inside are properties classes)

code : https://gist.github.com/RageshAntony/b6f0189d3ec06894afafd77b31bb17be
(examine home_view and map_view)