Function 'intalledges' over surface mesh (meshS)

Dear developers,

I am trying to use ‘intalledges’ function over a surface mesh, but I get the following output:
‘Internal error : intalledges (to do)’.
FreeFem++ version is 4.7 (on Manjaro OS).

I guess this feature and corresponding functions (such as ‘jump’) are yet to be implemented for surface mesh and surface elements ? In that case, is anyone aware of any ‘work around hack’ to use 2D ‘intalledges’ on general 3D surface mesh ?