pub unsafe extern "C" fn igraph_is_graphical(
out_degrees: *const igraph_vector_int_t,
in_degrees: *const igraph_vector_int_t,
allowed_edge_types: igraph_edge_type_sw_t,
res: *mut igraph_bool_t,
) -> igraph_error_tpub unsafe extern "C" fn igraph_is_graphical(
out_degrees: *const igraph_vector_int_t,
in_degrees: *const igraph_vector_int_t,
allowed_edge_types: igraph_edge_type_sw_t,
res: *mut igraph_bool_t,
) -> igraph_error_t