THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
...
The Lifecycle Callback Handler manage callbacks on the component when the component state changes.
Lifecycle
...
Callbacks
The lifecycle callbacks allow calling methods when the component state changed. You can use this features if your component need to do some actions when it becomes valid (for example create and launch a thread) or need to do some actions when it becomes invalid (for example stop the thread).
...