pub unsafe extern "C" fn igraph_joint_degree_distribution(
graph: *const igraph_t,
weights: *const igraph_vector_t,
p: *mut igraph_matrix_t,
from_mode: igraph_neimode_t,
to_mode: igraph_neimode_t,
directed_neighbors: igraph_bool_t,
normalized: igraph_bool_t,
max_from_degree: igraph_int_t,
max_to_degree: igraph_int_t,
) -> igraph_error_t