Mesh Dissection
A mesh can be composed of a continuous set of linked polygons or a group of distinct segments. This group of segments can be split apart and recombined much like the faces of a CAD model.
Use Mesh by Dissecting to create additional entries in the tree for each distinct mesh segment, and Mesh from Collection of Meshes to build a single mesh for a selection of segments. This is different from Stitching in that the mesh segments are unaltered.