所有已实现的接口:
CommandSource, Attackable, Targeting, VariantHolder<FrogVariant>, EntityAccess, Nameable, ICapabilityProvider, ICapabilityProviderImpl<Entity>, ICapabilitySerializable<CompoundTag>, IForgeEntity, IForgeLivingEntity, INBTSerializable<CompoundTag>

public class Frog extends Animal implements VariantHolder<FrogVariant>