@Override
    public void setRuntime(final long runTime) {
        this.mainMemory.setRuntime(runTime);
    }
@author Marko A. Rodriguez (http://markorodriguez.com)
tinkergraph-gremlin/src/main/java/org/apache/tinkerpop/gremlin/tinkergraph/process/computer/TinkerWorkerMemory.java