I'm trying to gain a better understanding of how to navigate the mesh topology. Could you please point me in the right direction when it comes to the following operations?

1. Face/Edge/Vertex Selection
   Given a ray, how can I select the intersecting mesh element? The function below returns a MeshTriPoint, is there a way to retrieve the corresponding Face, Edge or Vertex?
   

   MeshLib/source/MRMesh/MRMeshIntersect.h

   Lines 30 to 31 in 20f169b

   	MRMESH_API std::optional<MeshIntersectionResult> rayMeshIntersect( const MeshPart& meshPart, const Line3f& line,
   	float rayStart = 0.0f, float rayEnd = FLT_MAX, const IntersectionPrecomputes<float>* prec = nullptr, bool closestIntersect = true );

2. Internal Face Selection
   Given a closed edge loop (cyan), select all internal faces (yellow):
   
   

3. Hole & Boundary Selection
   Given a single edge (cyan), select the entire edge loop forming the hole boundary (yellow). Same applies to external boundaries:
   
   

4. Expanding/Shrinking Selection
   Given an arbitrary amount of selected faces expand or shrink the selection to include the neighboring faces: