pub unsafe extern "C" fn igraph_distances_floyd_warshall(
graph: *const igraph_t,
res: *mut igraph_matrix_t,
from: igraph_vs_t,
to: igraph_vs_t,
weights: *const igraph_vector_t,
mode: igraph_neimode_t,
method: igraph_floyd_warshall_algorithm_t,
) -> igraph_error_t