Function wasmtime_instance_export_get 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn wasmtime_instance_export_get(
    store: WasmtimeStoreContextMut<'_>,
    instance: &Instance,
    name: *const u8,
    name_len: usize,
    item: &mut MaybeUninit<wasmtime_extern_t>,
) -> bool