It might be required for you to import the package if you encounter any issues (like casting an Array), so better be safe than sorry and add the import at the very top of the file.

ZenScript
 Copy
import crafttweaker.api.world.data.LevelData;

Name	Type	Has Getter	Has Setter
Name dayTime	Type long	Has Getter true	Has Setter false
Name difficulty	Type Difficulty	Has Getter true	Has Setter false
Name gameTime	Type long	Has Getter true	Has Setter false
Name hardcore	Type boolean	Has Getter true	Has Setter false
Name isDifficultyLocked	Type boolean	Has Getter true	Has Setter false
Name raining	Type boolean	Has Getter true	Has Setter true
Name spawnAngle	Type float	Has Getter true	Has Setter false
Name thundering	Type boolean	Has Getter true	Has Setter false
Name xSpawn	Type int	Has Getter true	Has Setter false
Name ySpawn	Type int	Has Getter true	Has Setter false
Name zSpawn	Type int	Has Getter true	Has Setter false