Function igraph_watts_strogatz_game 

pub unsafe extern "C" fn igraph_watts_strogatz_game(
    graph: *mut igraph_t,
    dim: igraph_int_t,
    size: igraph_int_t,
    nei: igraph_int_t,
    p: igraph_real_t,
    allowed_edge_types: igraph_edge_type_sw_t,
) -> igraph_error_t