> For the complete documentation index, see [llms.txt](https://error.angular-package.dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://error.angular-package.dev/validationerror/methods.md).
# Methods
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| public static define(): ValidationError<Id>
Defines the ValidationError instance with the message built of the given required problem, fix and optional id on the supplied or stored template.
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| public static isValidationError(): value is ValidationError<Id>
Checks whether the value of any type is the ValidationError instance of any or the given identification.
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