example: ``` <FormRow className='js-phone-input' mask={['(', /[1-9]/, /\d/, /\d/, ')', ' ', /\d/, /\d/, /\d/, '-', /\d/, /\d/, /\d/, /\d/]} stacked type={MaskedInput} label='Phone Number' /> ``` causes the render to look like so (compared to another FormRow element): 