Classes must be in the org.firstinspires.ftc.teamcode package. To have easy access to the opMode, hardwareMap, telemetry, gamepad1, and gamepad2, classes can extends org.firstinspires.ftc.robotcore.external.BlocksOpModeCompanion. Methods must be public static and have no more than 21 parameters...
in my part to carry the printer from my place transporting via boat to the city (travelling for at least an hour by the sea) but with your help it solved my problem we can now continue the printing of the modules and self learning materials of the children since the classes will start...