code: def fetch(self):
          
          self.retrieveVals()
          for parent_name in self._graphNames:
              graph = self._graphDict[parent_name]
              if self.isMultigraph:
                  print "multigraph %s" % self._getMultigraphID(parent_name)
              print self._formatVals(graph.getVals())
              print
          if (self.isMultigraph and self._nestedGraphs 
              and self._subgraphDict and self._subgraphNames):
              for (parent_name, subgraph_names) in self._subgraphNames.iteritems():
                  for graph_name in subgraph_names:
                      graph = self._subgraphDict[parent_name][graph_name]
                      print "multigraph %s" % self.getMultigraphID(parent_name, 
                                                                   graph_name)
                      print self._formatVals(graph.getVals())
                      print
          return True
docs: Implements Munin Plugin Fetch Option.
  
          Prints out measured values.