pub(crate) fn _edge_rot_next(&self, edge_id: Option<EdgeIndex>) -> Option<EdgeIndex> {
        let _ = edge_id?;
        let prev = self._edge_get_prev(edge_id);
        self.edge_get_twin_(prev)
    }
/// Returns a pointer to the rotation next edge
/// over the starting point of the half-edge.
Returns a pointer to the rotation next edge
over the starting point of the half-edge.
Returns a pointer to the rotation next edge over the starting point of the half - edge .
pub(crate) fn _edge_rot_next(&self, edge_id: Option<EdgeIndex>) -> Option<EdgeIndex> {
        let _ = edge_id?;
        let prev = self._edge_get_prev(edge_id);
        self.edge_get_twin_(prev)
    }
pub ( crate ) fn _edge_rot_next ( & self , edge_id : Option < EdgeIndex > ) -> Option < EdgeIndex > { let _ = edge_id ? ; let prev = self . _edge_get_prev ( edge_id ) ; self . edge_get_twin_ ( prev ) }
Returns a pointer to the rotation next edge
over the starting point of the half-edge.
Returns a pointer to the rotation next edge over the starting point of the half - edge .
&self
edge_id
Option<EdgeIndex>