> 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/methods.md).
# Methods
The \`CommonErrors\` methods
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| public delete(): this
Deletes the error of a specified id from the object.
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| public has(): boolean
The has() method checks whether the error of the given id exists in a specified object.
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| public throw(): void
Throws an error of the given id if the unique id was provided in the constructor.
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| protected isAllowedId(): boolean
Checks whether the given identification number was provided in the constructor.
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