Promise which is resolved when the system is initialized and ready to use.
Is this object destroyed?
Checks if the system is initialized and ready to use.
Note: This is just a debug class
Binds new registration with itself. This registration/destroyable will be destroyed with this.
Checks if the system is initialized and ready to use. If not, throws an error. If it is, do nothing.
Checks, whether the object is not destroyed
Message that will replace default one before error
Callback runed before error is thrown; typically this can be some logging
when null or undefined returns null
Chcek whether the given object is destroyable