Method setError

Bolts/src/bolts/Task.java:635–639

Sets the error of the Task, throwing if the Task has already been completed.

(Exception error)

     * Sets the error of the Task, throwing if the Task has already been completed.
     */
    public void setError(Exception error) {
      if (!trySetError(error)) {
        throw new IllegalStateException("Cannot set the error on a completed task.");
      }
    }
  }
}