Global Loot Modifier Generation

Global Loot Modifiers (GLMs) can be generated for a mod by subclassing GlobalLootModifierProvider and implementing #start. Each GLM can be added generated by calling #add and specifying the name of the modifier, the serializer of the modifier, and the modifier instance to be serialized. After implementation, the provider must be added to the DataGenerator.

// In some GlobalLootModifierProvider#start
this.add("example_modifier", EXAMPLE_MODIFIER_SERIALIZER, new ExampleModifier(
  new LootItemCondition[] {
    WeatherCheck.weather().setRaining(true).build() // Executes when raining
  },
  "val1",
  10,
  Items.DIRT
));