pub trait Incidence: WithEdge + Adjacency {
fn out_edges(&self, v: Self::Vertex) -> Self::OutEdgeIter;
fn out_edges_ends(
&self,
v: Self::Vertex
) -> EdgesEnds<'_, Self, Self::OutEdgeIter> ⓘ { ... }
fn out_edges_with_ends(
&self,
v: Self::Vertex
) -> EdgesWithEnds<'_, Self, Self::OutEdgeIter> ⓘ { ... }
}