Android configuration file looks nothing like example

[iantearle]

Is anyone able to show me what the MainActivity.java file is supposed to look like?

My file only has:

package com.savemoneycutcarbon.sustainability;

import com.getcapacitor.BridgeActivity;

public class MainActivity extends BridgeActivity {}

I'm struggling to work out where to add

 this.init(savedInstanceState, new ArrayList<Class<? extends Plugin>>() {{
        add(com.vrba.plugins.facebookanalytics.FacebookAnalytics.class);
    }});