Class TextValidation

// Add a text item to a form and require it to be a number within a range. const form = FormApp.create('My form'); const textItem =     form.addTextItem().setTitle('Pick a number between 1 and 100?'); const textValidation =     FormApp.createTextValidation()         .setHelpText('Input was not a number between 1 and 100.')         .requireNumberBetween(1, 100)         .build(); textItem.setValidation(textValidation);