/**
* @license Copyright (c) 2003-2026, CKSource Holding sp. z o.o. All rights reserved.
* For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-licensing-options
*/
/**
* Returns the error code regardless of the error class. Reads `error.code` from an
* {@link AICoreError}; for any other `Error` (such as `CKEditorError`) returns the leading
* non-whitespace token of `error.message`. Returns `undefined` for non-Error inputs or empty
* messages.
*
* The whitespace-aware split matters for `CKEditorError`, whose message is
* `<code>\nRead more: …` — a plain space split would return `<code>\nRead`.
*
* Use this at call sites that branch on the error code so they keep working as throw sites
* migrate from `CKEditorError` to {@link AICoreError}.
*/
export declare function getErrorCode(error: unknown): string | undefined;