export declare class TimelineKey {
    type: string;
    seq: number;
    key?: string;
    constructor(type: string, seq: number, key?: string);
    toJSON(): any;
    toString(): string;
    static DeleteKey: () => TimelineKey;
    static fromArgs(typeOrTimelineKey: TimelineKey | string, keystring?: string, delim?: string): TimelineKey;
    static fromString(str: any): TimelineKey;
    static fromJSON: (obj: any) => any;
    static serializer: Readonly<{
        atob: (tlineKey: any) => any;
        btoa: (str: any) => TimelineKey;
    }>;
}
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