Reads the values that a currently visible Scene V2 is outputting and stores them in local variables.
Every output variable that the scene's elements are configured to produce is returned, using the variable names you set up in the scene.
Screen ID is required and must match the Screen ID used when the scene was shown.
For example, a TextInput returns the text the user entered and a Switch returns its checked state. Elements with no output variable configured, such as a plain Text element, produce nothing.
If more than one element writes to the same variable name, that variable is returned as an array.
Check Scenes V2 (Screen Builder) Manual for full details on how Scenes V2 work.