pub fn twin_id(&self) -> Option<HalfEdgeID>
    {
        if let Some(ref halfedge) = self.current_info { halfedge.twin }
        else { None }
    }
/// Returns the id of the twin half-edge to the current half-edge or `None` if the walker has walked outside of the mesh at some point.
Returns the id of the twin half-edge to the current half-edge or `None` if the walker has walked outside of the mesh at some point.
Returns the id of the twin half - edge to the current half - edge or ` None ` if the walker has walked outside of the mesh at some point .
pub fn twin_id(&self) -> Option<HalfEdgeID>
    {
        if let Some(ref halfedge) = self.current_info { halfedge.twin }
        else { None }
    }
pub fn twin_id ( & self ) -> Option < HalfEdgeID > { if let Some ( ref halfedge ) = self . current_info { halfedge . twin } else { None } }
Returns the id of the twin half-edge to the current half-edge or `None` if the walker has walked outside of the mesh at some point.
Returns the id of the twin half - edge to the current half - edge or ` None ` if the walker has walked outside of the mesh at some point .
&self
&self