anchor.diff:  * Set3 - Set a Label
   * Set4 - Set all properties with a map
   * Set5 - Set multiple properties with a map
  +* Set6 - Persistence of set clause side effects
   
   === Union
   
  
positive.code: * Call2 - Procedure arguments
  * Call3 - Assignable-type arguments
  * Call4 - Null Arguments
  * Call6 - Call clause interoperation with other clauses
  
  === Create
  
negative.code: 
  === Boolean
  
  * Boolean1 - And logical operations
  * Boolean2 - OR logical operations
  * Boolean3 - XOR logical operations
  * Boolean4 - NOT logical operations
  * Boolean5 - Interop of logical operations
  
  === Comparison
  
  