pub unsafe extern "C" fn igraph_girth(
graph: *const igraph_t,
girth: *mut igraph_real_t,
circle: *mut igraph_vector_int_t,
) -> igraph_error_tpub unsafe extern "C" fn igraph_girth(
graph: *const igraph_t,
girth: *mut igraph_real_t,
circle: *mut igraph_vector_int_t,
) -> igraph_error_t