/*
 * This file is part of Sponge, licensed under the MIT License (MIT).
 *
 * Copyright (c) SpongePowered <https://www.spongepowered.org>
 * Copyright (c) contributors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package org.spongepowered.mod.mixin.core.common;

import net.minecraft.util.BlockPos;
import net.minecraft.world.IBlockAccess;
import net.minecraft.world.WorldType;
import net.minecraft.world.biome.BiomeGenBase;
import org.spongepowered.asm.mixin.Final;
import org.spongepowered.asm.mixin.Mixin;
import org.spongepowered.asm.mixin.Shadow;
import org.spongepowered.common.world.SpongeProxyBlockAccess;

@Mixin(SpongeProxyBlockAccess.class)
public class MixinSpongeProxyBlockAccess {

    @Shadow @Final IBlockAccess original;

    // These methods are @SideOnly(Side.CLIENT)
    // We only mix them in in SpongeForge, so that mod blocks
    // don't break when trying to call these methods on the SpongeProxyBlockAccess
    // we pass in

    public int getCombinedLight(BlockPos pos, int lightValue) {
        return this.original.getCombinedLight(pos, lightValue);
    }

    public BiomeGenBase getBiomeGenForCoords(BlockPos pos) {
        return this.original.getBiomeGenForCoords(pos);
    }

    public boolean extendedLevelsInChunkCache() {
        return this.original.extendedLevelsInChunkCache();
    }

    public WorldType getWorldType() {
        return this.original.getWorldType();
    }
}

@@ -1687,16 +1687,25 @@
 %0Apublic 
+abstract 
 class Mi
@@ -1730,16 +1730,40 @@
 kAccess 
+implements IBlockAccess 
 %7B%0A%0A    @
@@ -2012,16 +2012,30 @@
 ass in%0A%0A
+    @Override%0A
     publ
@@ -2153,32 +2153,46 @@
 tValue);%0A    %7D%0A%0A
+    @Override%0A
     public Biome
@@ -2291,32 +2291,46 @@
 ds(pos);%0A    %7D%0A%0A
+    @Override%0A
     public boole
@@ -2425,24 +2425,38 @@
 e();%0A    %7D%0A%0A
+    @Override%0A
     public W

Make MixinSpongeProxyBlockAccess implement IBlockAccess