pub unsafe extern "C" fn igraph_is_chordal(
graph: *const igraph_t,
alpha: *const igraph_vector_int_t,
alpham1: *const igraph_vector_int_t,
chordal: *mut igraph_bool_t,
fill_in: *mut igraph_vector_int_t,
newgraph: *mut igraph_t,
) -> igraph_error_t