/// <summary>
/// Gets the asset.
/// </summary>
/// <returns>The asset.</returns>
/// <param name="key">url if urlFormat is null or parameter for urlFormat otherwise.</param>
public void GetAsset(string key, Action <T> callback)
{
T ins = pool.Get(key);
if (ins != null)
{
callback(ins);
}
else
{
Preload(key, a => {
callback(a);
});
}
}
internal static Component FindById(int id)
{
// Returns null if not known or already garbage collected
return(LookupById.Get(id));
}