anchor.diff:  
   Let's assume the graph below:
   
  -image::resources/images/graph1.png[]
  +image::https://raw.githubusercontent.com/neo4j-contrib/neo4j_doc_manager/master/docs/resources/images/graph1.png[]
   
   
   If the update clause does not match any document, by default a new document is not created. However, if you pass the parameter _{upsert: true}_, a new document is created. For example, assume we run the following clause:
  
positive.code: 
  We will have both properties, _room_ and _timeslot_, updated into the graph.
  
  image::resources/images/graph8.png[]
  
  
  ===== $unset
  
negative.code: 
  The above document will be translated into Neo4j as follows:
  
  image::https://raw.githubusercontent.com/neo4j-contrib/neo4j_doc_manager/master/docs/resources/images/graph3.png[]
  
  
  **Created nodes:**
  