export declare class ShowSignatureFileRequest {
    private 'Content-Type'?;
    private 'file_id'?;
    constructor(contentType?: string, fileId?: string);
    withContentType(contentType: string): ShowSignatureFileRequest;
    set contentType(contentType: string | undefined);
    get contentType(): string | undefined;
    withFileId(fileId: string): ShowSignatureFileRequest;
    set fileId(fileId: string | undefined);
    get fileId(): string | undefined;
}
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