I don't understand the "by default..." sentence.. and it seems that there are color attached to something..

In the description, you could briefly describe how the mesh is stored (e.g.: vertex are explicitly stored and there is a list of faces with triplets of vertices...).

You could also comment that it is a preliminary version of a mesh structure (for instance, one could expect to have method to access neigborhing facets to a given facet...)...