Function wasmtime_arrayref_len 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn wasmtime_arrayref_len(
    cx: WasmtimeStoreContextMut<'_>,
    arrayref: Option<&wasmtime_arrayref_t>,
    out: &mut MaybeUninit<u32>,
) -> Option<Box<wasmtime_error_t>>