> For the complete documentation index, see [llms.txt](https://docs.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://docs.angular-package.dev/error/commonerrors/properties.md).
# Properties
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| public static template?: string
Optional template of string type.
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| #id?: Set<Id>
An optional collection of unique allowed identification numbers of generic type variable Id under which errors are stored.
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| #errors: Map<Id, any>
The errors storage of the Map type where the key is of the generic type variable Id.
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