Is it required to inherit to query colision between 2 object

[jokooon]

I'm only using collision detection.

I just want to detect a collision between 2 collision objects, one being a sphere, the other a btBvhTriangleMeshShape, so I use contactPairTest(), but I can't find any existing default class which inherit ContactResultCallback.

For raycasts I did not need to inherit, there was a default inherited class which I could use.