pub unsafe extern "C" fn igraph_callaway_traits_game(
graph: *mut igraph_t,
nodes: igraph_int_t,
types: igraph_int_t,
edges_per_step: igraph_int_t,
type_dist: *const igraph_vector_t,
pref_matrix: *const igraph_matrix_t,
directed: igraph_bool_t,
node_type_vec: *mut igraph_vector_int_t,
) -> igraph_error_t