Function igraph_vector_ptr_sort_ind 

pub unsafe extern "C" fn igraph_vector_ptr_sort_ind(
    v: *mut igraph_vector_ptr_t,
    inds: *mut igraph_vector_int_t,
    compar: Option<unsafe extern "C" fn(arg1: *const c_void, arg2: *const c_void) -> c_int>,
) -> igraph_error_t