/**
 * Parses a comma-separated widget attribute into a trimmed, non-empty string
 * array.
 *
 * Returns undefined for an absent/blank value, and also for legacy base64
 * payloads (`data:text/plain;base64,...`) that older Staffbase versions stored,
 * so those never leak through as bogus filter entries.
 * @param {string | null | undefined} value - The raw attribute value.
 * @returns {string[] | undefined} The parsed list, or undefined.
 */
export declare const parseCommaSeparated: (value: string | null | undefined) => string[] | undefined;
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