pub fn iter_nodes<'a>(&'a self) -> NodeIter<'a, K, D> {
        NodeIter {
            graph: self,
            node_id: 0,
        }
    }
/// Return an iterator over all nodes in the graph
Return an iterator over all nodes in the graph
Return an iterator over all nodes in the graph
pub fn iter_nodes<'a>(&'a self) -> NodeIter<'a, K, D> {
        NodeIter {
            graph: self,
            node_id: 0,
        }
    }
pub fn iter_nodes < ' a > ( & ' a self ) -> NodeIter < ' a , K , D > { NodeIter { graph : self , node_id : 0 , } }
Return an iterator over all nodes in the graph
Return an iterator over all nodes in the graph
&'a self
&'a self