result = validator.isBase64('sample');

  result = validator.isBefore('sample');
  result = validator.isBefore('sample', new Date().toString());

  result = validator.isBoolean('sample');

  let isByteLengthOptions: ValidatorJS.IsByteLengthOptions;
  result = validator.isByteLength('sample', isByteLengthOptions);
  result = validator.isByteLength('sample', 0);
  result = validator.isByteLength('sample', 0, 42);

  result = validator.isCreditCard('sample');

  let isCurrencyOptions: ValidatorJS.IsCurrencyOptions;
  result = validator.isCurrency('sample');
  result = validator.isCurrency('sample', isCurrencyOptions);

  result = validator.isDataURI('sample');

  result = validator.isDate('sample');

  result = validator.isDecimal('sample');

  result = validator.isDivisibleBy('sample', 2);

  let isEmailOptions: ValidatorJS.IsEmailOptions;
  result = validator.isEmail('sample');
  result = validator.isEmail('sample', isEmailOptions);

  let isFQDNOptions: ValidatorJS.IsFQDNOptions;

 validation: (val: number) => validator.isCurrency(val.toString())