anchor.diff:  
   By extending Traversal, users can create a DSL that is respective of the semantics of their data. Instead of querying in terms of vertices/edges/properties, they can query in terms of, for example, people, their friends, and their names.
   
  +[[graphcomputer]]
   The GraphComputer API
   =====================
   
  
positive.code: assert(g.E().count() == 0)
  // tada!
  
  Here is the same code, but using Gremlin-Groovy in the <<gremlinconsole,Gremlin Console>>.
  
  [source,groovy]
  ----
  
negative.code: export GIRAPH_HOME=/usr/local/giraph-1.0.0
  export GIRAPH_GREMLIN_HOME=/usr/local/giraph-gremlin-3.0.0
  
  If using the <<gremlin-console,Gremlin Console>>, it is important to install the Giraph-Gremlin plugin.
  
  [source,text]
  ----
  