code: def doc_children(self, doctype, limiters=[]):
          
          result = []
          for doc in self.docstring:
              if len(limiters) == 0 or doc.doctype in limiters:
                  result.extend(doc.children(doctype))
  
          return result
docs: Finds all grand-children of this element's docstrings that match
          the specified doctype. If 'limiters' is specified, only docstrings
          with those doctypes are searched.