code: def is_dirty(using=None):
      
      if using is None:
          dirty = False
          for using in tldap.backend.connections:
              connection = tldap.backend.connections[using]
              if connection.is_dirty():
                  dirty = True
          return dirty
      connection = tldap.backend.connections[using]
      return connection.is_dirty()
docs: Returns True if the current transaction requires a commit for changes to
      happen.