docs: def _format_import_example(self, task_class):
          """Generate nodes that show a code sample demonstrating how to import
          the task class.
  
          Parameters
          ----------
          task_class : ``lsst.pipe.base.Task``-type
              The Task class.
  
          Returns
          -------
          nodes : `list` of docutils nodes
              Docutils nodes showing a class import statement.
          """
          code = 'from {0.__module__} import {0.__name__}'.format(task_class)
  
          # This is a bare-bones version of what Sphinx's code-block directive
          # does. The 'language' attr triggers the pygments treatment.
          literal_node = nodes.literal_block(code, code)
          literal_node['language'] = 'py'
  
          return [literal_node]