export declare enum TaskStatus {
    /** Means that the task has never run or has been reset. */
    Invalid = 0,
    /** Means that the task returned a success result. */
    Succeeded = 1,
    /** Means that the task returned a failure result.  */
    Failed = 2,
    /** Means that the task needs to run again. */
    Running = 3,
    /** Means that the task has been terminated by an ancestor. */
    Canceled = 4
}