code: def setMLPrefix(self, sMeshLocalPrefix):
          
          print '%s call setMLPrefix' % self.port
          try:
              cmd = 'dataset meshlocalprefix %s' % sMeshLocalPrefix
              self.hasActiveDatasetToCommit = True
              return self.__sendCommand(cmd)[0] == 'Done'
          except Exception, e:
              ModuleHelper.WriteIntoDebugLogger("setMLPrefix() Error: " + str(e))
docs: set mesh local prefix