ModOnly

The @ModOnly annotation is as simple as the name suggests:
It only registers a ZenClass if the provided mod is loaded.

Example

CraftTweaker Test Project ModOnly

@ModOnly(value = "mcp")
@ZenClass(value = "crafttweaker.tests.modOnly")
@ZenRegister
public class ModOnlyWiki {
  @ZenMethod
  public static void print() {
    CraftTweakerAPI.logInfo("print issued");
  }
}

What classes can be annotated || Additional Info

• You can annotate all Java Classes that also have the @ZenRegister Annotation. Technically, you can register all classes, but only there it will have an impact.
• The Annotation requires a String value that represents the modName (isModLoaded(annotation.getValue()) has to return true of the mod is loaded)