this.getProgressNotifier().notifyListeners(ProgressInfo.BUSY_PROGRESS);
NewStarFromObSourcePluginWithSuppliedFileTask task = new NewStarFromObSourcePluginWithSuppliedFileTask(
obSourcePlugin, file, isAdditive);
this.currTask = task;
task.execute();
}
/**
* Creates and executes a background task to handle
* new-star-from-external-source-plugin when a URL is supplied.