suggestion/question: edge_file_from_layout functionality as counterpart of layout_from_edge_file

[yetkinozturk]

graph-force/src/lib.rs

Line 48 in 14a5c61

fn layout_from_edge_file(

I really like the idea of supporting large graphs via file, is it possible to implement an opposite action for saving graphs to a file?
This can be a nice building block for implementing a graph storage