Function mlx_closure_custom_vmap_new_func 

pub unsafe extern "C" fn mlx_closure_custom_vmap_new_func(
    fun: Option<unsafe extern "C" fn(arg1: *mut mlx_vector_array, arg2: *mut mlx_vector_int, arg3: mlx_vector_array, arg4: *const c_int, _num: usize) -> c_int>,
) -> mlx_closure_custom_vmap