Network_find_faces

in order to do the face recognition for any network, I used to do the following:

mesh=Mesh.from_data(network.to_data())
mesh.halfedge=network.halfedge
network_find_faces(mesh, mesh.leaves())

Now I noticed mesh.leaves() and network.leaves() become empty after network_find_faces (my network had leaf edges originally). Is there a reason for that?

can you send me a sample json?

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