ganv_canvas_for_each_edge_from

void ganv_canvas_for_each_edge_from (GanvCanvas* canvas,
                                     const GanvNode* tail,
                                     GanvEdgeFunc f,
                                     void* data);

canvas: The canvas.
tail: The tail to enumerate every edge for.
f: A function to call on every edge leaving tail.
data
Returns