gremlin> graph = TinkerFactory.createModern()
==>tinkergraph[vertices:6 edges:6]
gremlin> g = graph.traversal()
==>graphtraversalsource[tinkergraph[vertices:6 edges:6], standard]
gremlin> g.V(1).properties('name').elementMap()
==>[id:0,key:name,value:marko]
gremlin> g.V(1).properties('name').property('metatest', 'hi')
==>vp[name->marko]
gremlin> g.V(1).properties('name').elementMap()
==>[id:0,key:name,value:marko,metatest:hi]
gremlin> g.addV('person').property('name', 'turing')
==>v[13]
gremlin> g.io('data/metatest.xml').write().iterate()
gremlin>