Function egui_graphs::add_node

pub fn add_node<N: Clone, E: Clone, Ty: EdgeType, Ix: IndexType, D: DisplayNode<N, E, Ty, Ix>>(
    g: &mut Graph<N, E, Ty, Ix, D>,
    n: &N
) -> NodeIndex<Ix>

Helper function which adds user’s node to the super::Graph instance.

If graph is not empty it picks any node position and adds new node in the vicinity of it.