/**
 * Frame generated values and authored structured examples as sequential content.
 * Callers bypass this helper for authored strings that already contain wire framing.
 * SSE objects with no valid fields are omitted with one warning per call; an empty
 * input sequence is valid and does not produce a warning.
 */
export declare const serializeStreamExample: (value: unknown, contentType: string, singleItem: boolean) => string | undefined;
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