code: def find_children(self, linespec):
          
          res = []
          for parent in self.find_objects(linespec):
              res.append(parent.line)
              res.extend([child.line for child in parent.children])
          return res
docs: Find lines and immediate children that match the linespec regex.
  
          :param linespec: regular expression of line to match
          :returns: list of lines. These correspond to the lines that were
              matched and their immediate children