anchor.diff:  gremlin> :plugin list <4>
   ==>tinkerpop.server[active]
   ==>tinkerpop.gephi
  -==>tinkerpop.sugar[active]
   ==>tinkerpop.utilities[active]
  +==>tinkerpop.sugar
  +==>tinkerpop.tinkergraph[active]
   ==>tinkerpop.neo4j
   gremlin> :plugin use tinkerpop.neo4j <5>
   ==>tinkerpop.neo4j activated
  
positive.code: ==>tinkerpop.sugar[active]
  ==>tinkerpop.utilities[active]
  ==>tinkerpop.neo4j[active]
  ----
  
  <1> Show a list of "available" plugins.  The list of "available" plugins is determined by the classes available on the Console classpath.  Plugins need to be "active" for their features to be available.
  
negative.code: gremlin> :plugin list  <1>
  ==>tinkerpop.server[active]
  ==>tinkerpop.gephi
  ==>tinkerpop.utilities[active]
  ==>tinkerpop.sugar
  ==>tinkerpop.tinkergraph[active]
  gremlin> :plugin use tinkerpop.sugar  <2>
  ==>tinkerpop.sugar activated
  gremlin> :install com.tinkerpop neo4j-gremlin x.y.z  <3>
  