@Override
    public void set(final String key, Object value) {
        // this.checkKeyValue(key, value);
        this.memoryMap.put(key, value);
    }
@author Marko A. Rodriguez (http://markorodriguez.com)
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/computer/util/MapMemory.java