text: import memoize from 'lru-memoize';
  import {createValidator, required, integer, maxLength} from './validation';
  
  const contactDetailsValidation = createValidator({
    mobile: [integer, maxLength(10)],
    landline: [integer, maxLength(10)],
    street: [required],
    postalCode: [required, integer, maxLength(5)],
    city: [required]
  });
  export default memoize(10)(contactDetailsValidation);