code: def get_item(self, name, bootstrap=False):
          
          for item in self._get_items(bootstrap):
              if item.name == name:
                  return item
          return None
docs: Get a particular item in the specification.
  
          Args:
              name (str): The name of the item to retrieve.
              bootstrap (bool): Only search bootstrap items
  
          Returns (YapconfItem):
              A YapconfItem if it is found, None otherwise.