contains method

ValidatorString contains(
  1. String subStr, {
  2. String errMsg(
    1. String subStr
    )?,
})

Implementation

ValidatorString contains(String subStr,
    {String Function(String subStr)? errMsg}) {
  validate((v) => value.toString().contains(subStr)
      ? null
      : DynamicUtils.checkNull(errMsg, () => 'Must contain $subStr',
          ifNotNull: () => errMsg!(subStr)));
  return this;
}