fn next_from_ix<G0, G1>(
st: &mut (Vf2State<'_, G0>, Vf2State<'_, G1>),
nx: G1::NodeId,
open_list: OpenList,
) -> Option<G1::NodeId>where
G0: GetAdjacencyMatrix + GraphProp + NodeCompactIndexable + IntoNeighborsDirected,
G1: GetAdjacencyMatrix + GraphProp + NodeCompactIndexable + IntoNeighborsDirected,