fn push_state<G0, G1>(
st: &mut (Vf2State<'_, G0>, Vf2State<'_, G1>),
nodes: (G0::NodeId, G1::NodeId),
)where
G0: GetAdjacencyMatrix + GraphProp + NodeCompactIndexable + IntoNeighborsDirected,
G1: GetAdjacencyMatrix + GraphProp + NodeCompactIndexable + IntoNeighborsDirected,