How can I make the switch toggle on when application opens?

This is Sketchware application

I’m trying to make switch toggle on when application opens.

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1. ERROR in /storage/emulated/0/.sketchware/mysc/610/app/src/main/java/com/my/newproject10/MainActivity.java (at line 117)

   switch1.setOnChecked(true);

        ^^^^^^^^^^^^
   

The method setOnChecked(boolean) is undefined for the type Switch

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1 problem (1 error)