export declare class SubjectInfor {
    subject: string;
    target: string;
    action: string;
    get flowAction(): "" | "==>" | "-->" | "-.->|pub/emit|" | "-.->|sub/on|";
    get uniqueAction(): "" | "==>" | "-->" | "<-.-" | "-.->";
    toMMD(): string;
    toString(): string;
}