Grid change

grid.js

app.getObject( "THE SHEET ID" ).then(function(obj) {
  // Patch some properties on the sheet.
  // In this case replace the column and row properties with new values
	obj.applyPatches([{
		qPath: '/columns',
		qOp: 'replace',
		qValue: '200'
	},{
		qPath: '/rows',
		qOp: 'replace',
		qValue: '100'
	}])
})
.then(function() {
  // Save the app, on QES you could just save 
  // the objects instead of the whole app.
  return app.doSave()
})