Hey there, newbie here. If I'm looking to run getLineCount({sublistId: 'addressbook'}); in the browser console, how do i run it on the record i currently have open?

use something like this in your browser console

require(['N/currentRecord'], function(currentRecord) {
  var rec = currentRecord.get();
  var n = rec.getLineCount({ sublistId: 'addressbook' });
  console.log(n);
});

Thanks