Annotation based configuration with Kotlin

Configuration.kt

package com.jamieswhiteshirt.responsiveinventory

import net.minecraftforge.common.config.Config

@Config(modid = ResponsiveInventory.MODID)
object Configuration {
    @JvmField
    @Config.Comment("It's a test")
    var test = 0

    @JvmField
    val testCategory = ItemSounds()

    class ItemSounds {
        @Config.Comment("Play sounds for items in inventories")
        @JvmField
        var inventory = true

        @Config.Comment("Play sounds for items in main hand")
        @JvmField
        var mainHand = true

        @Config.Comment("Play sounds for items in off hand")
        @JvmField
        var offHand = true
    }
}

responsiveinventory.cfg

# Configuration file

general {
    # It's a test
    I:test=0

    instance {
    }

    testcategory {
        # Play sounds for items in inventories
        B:inventory=true

        # Play sounds for items in main hand
        B:mainHand=true

        # Play sounds for items in off hand
        B:offHand=true
    }

}