anchor.diff:  
   If we execute this query, it will result in the following graph:
   
  -image::apoc.refactor.invert.png[scaledwidth="100%"]+image::apoc.refactor.invert.png[scaledwidth="100%"]
  
positive.code: .The following inverts the direction of the relationship:
  [source,cypher]
  ----
  MATCH (f:Foo)-[rel:FOOBAR {a:1}]->(b:Bar)
  CALL apoc.refactor.invert(rel)
  yield input, output
  RETURN input, output
  
negative.code: 
  [source,cypher]
  ----
  CREATE (c:Car {make:"Volvo")-[rel:DRIVES {year:2001}]->(p:Person {name:"Dan"})
  ----
  
  image::apoc.refactor.invert.dataset.png[scaledwidth="100%"]
  