Usage of nonexistent function low_level_api::can_add_or_get_halfedge(vertex_index, vertex_index) changed to correct function low_level_api(this->m).add_or_get_halfedge(v2.idx, v0.idx).
low_level_api::can_add_or_get_halfedge(vertex_index, vertex_index)
low_level_api(this->m).add_or_get_halfedge(v2.idx, v0.idx)