export declare class MultiPartParser {
    #private;
    constructor(rawContent: ArrayBuffer | Uint8Array);
    get isAttachment(): boolean;
    get contentType(): string | null;
    getContentId(): string | null;
    getContentType(): {
        mediaType: string | null;
        subType: string | null;
        args: string | null;
    };
    getBody(): any;
    getPartByContentType(mediaType: string, subType?: string | null): MultiPartParser | null;
    getHeader(key: string, decode?: boolean, removeLineBreaks?: boolean): string | string[] | null;
    getMultiParts(): MultiPartParser[];
    getFilename(): string | null;
}