Function igraph_local_scan_k_ecount 

pub unsafe extern "C" fn igraph_local_scan_k_ecount(
    graph: *const igraph_t,
    k: igraph_int_t,
    res: *mut igraph_vector_t,
    weights: *const igraph_vector_t,
    mode: igraph_neimode_t,
) -> igraph_error_t