Update mappings to stable_39-1.12 (#322)

src/main/java/appeng/block/networking/BlockWireless.java

@@ -40,6 +40,7 @@ import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.IBlockAccess;
 import net.minecraft.world.World;
 
+import javax.annotation.Nonnull;
 import java.util.Collections;
 import java.util.List;
 
@@ -68,7 +69,7 @@ public class BlockWireless extends AEBaseTileBlock implements ICustomCollision {
     }
 
     @Override
-    public BlockRenderLayer getBlockLayer() {
+    public BlockRenderLayer getRenderLayer() {
         return BlockRenderLayer.CUTOUT;
     }