code: def is_github_task(task):
      
      return any((
          # XXX Cron tasks don't usually define 'taskcluster-github' as their schedulerId as they
          # are scheduled within another Taskcluster task.
          task.get('schedulerId') == 'taskcluster-github',
          # XXX Same here, cron tasks don't start with github
          task.get('extra', {}).get('tasks_for', '').startswith('github-'),
          is_github_url(task.get('metadata', {}).get('source', '')),
      ))
docs: Determine if a task is related to GitHub.
  
      This function currently looks into the ``schedulerId``, ``extra.tasks_for``, and
      ``metadata.source``.
  
      Args:
          task (dict): the task definition to check.
  
      Returns:
          bool: True if a piece of data refers to GitHub