anchor.diff:  Hard constraints:
   
   * *No unassigned shifts* (built-in): Every shift need to be assigned to an employee.
  -* **Shift conflict**: An employee can have only 1 shift per day.
  +* **Shift conflict**: An employee can have only one shift per day.
   
   Soft constraints:
   
  
positive.code:     // ... getters and setters
  }
  ----
  
  [source,java,options="nowrap"]
  ----
  public class Queen {
  
negative.code: |3
  |===
  
  When two queens share the same column, row or diagonal line, such as ($$*$$) and ($$**$$), they can attack each other.
  
  
  [[cloudBalancing]]
  