export declare class AttachmentDisplayService {
    /**
     * Format attachment detail for display.
     * Returns lines for console output, or JSON string if jsonOutput is true.
     */
    formatAttachmentDetail(attachment: any, jsonOutput: boolean): string[];
    /**
     * Format attachment list for display.
     * Returns lines for console output, or JSON string if jsonOutput is true.
     */
    formatAttachmentList(attachments: any[], jsonOutput: boolean): string[];
    /**
     * Format upload result for display.
     * Returns lines for console output, or JSON string if jsonOutput is true.
     */
    formatUploadResult(result: any, jsonOutput: boolean): string[];
}
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