code: public <M> Graph<K, VV, EV> runVertexCentricIteration(
  			ComputeFunction<K, VV, EV, M> computeFunction,
  			MessageCombiner<K, M> combiner, int maximumNumberOfIterations) {
  
  		return this.runVertexCentricIteration(computeFunction, combiner, maximumNumberOfIterations, null);
  	}
docs: Runs a {@link VertexCentricIteration} on the graph.
  No configuration options are provided.
  
  @param computeFunction the vertex compute function
  @param combiner an optional message combiner
  @param maximumNumberOfIterations maximum number of iterations to perform
  
  @return the updated Graph after the vertex-centric iteration has converged or
  after maximumNumberOfIterations.