-record(multi_graph, {
    kind :: yog@model:graph_type(),
    nodes :: gleam@dict:dict(integer(), any()),
    edges :: gleam@dict:dict(integer(), {integer(), integer(), any()}),
    out_edge_ids :: gleam@dict:dict(integer(), list(integer())),
    in_edge_ids :: gleam@dict:dict(integer(), list(integer())),
    next_edge_id :: integer()
}).