Package org.optaplanner.core.api.domain.entity

## Interface PlanningEntity.NullDifficultyComparator

- All Superinterfaces:
    `Comparator`
  Enclosing class:
    PlanningEntity

      public static interface PlanningEntity.NullDifficultyComparator
      extends Comparator

  Workaround for annotation limitation in `PlanningEntity.difficultyComparatorClass()`.

- - ### Method Summary

    - ### Methods inherited from interface java.util.Comparator

      `compare, equals, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong`