var newCustomList = record.create({
	type: 'customlist',
	//has to be set to dynamic record in order to be able to add lines
	isDynamic: true, 
	defaultValues: null
});

var newCustomRecordTable = record.create({
	type: 'customrecordtype',
	isDynamic: true, //has to be set to dynamic record in order to be able to add lines
	defaultValues: null
});

var newCustomItemField = record.create({
	type: 'itemcustomfield',
	isDynamic: true, 
	defaultValues: null
});