proc fetchRemoteTask(url: string): string {....raises: [OSError, IOError,
    ValueError, HttpRequestError, LibraryError, Exception, OSError, SslError,
    IOError, TimeoutError, ProtocolError, KeyError], tags: [ReadEnvEffect,
    ReadIOEffect, WriteDirEffect, ReadDirEffect, RootEffect, WriteIOEffect,
    TimeEffect], forbids: [].}