Highly incomplete code. First work on porting to 1.12. Still need to rework a LOT of things.

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

@@ -377,7 +377,7 @@ public class BlockCableBus extends AEBaseTileBlock
 
 	@Override
 	@SideOnly( Side.CLIENT )
-	public void getSubBlocks( final Item item, final CreativeTabs tabs, final NonNullList<ItemStack> itemStacks )
+	public void getSubBlocks( final CreativeTabs tabs, final NonNullList<ItemStack> itemStacks )
 	{
 		// do nothing
 	}

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

@@ -34,6 +34,9 @@ import net.minecraft.world.World;
 import appeng.block.AEBaseTileBlock;
 import appeng.tile.networking.TileController;
 
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+
 public class BlockController extends AEBaseTileBlock
 {
 
@@ -96,6 +99,7 @@ public class BlockController extends AEBaseTileBlock
 	 * controllers and the network state of this controller (offline, online, conflicted). This is used to
 	 * get a rudimentary connected texture feel for the controller based on how it is placed.
 	 */
+	@SuppressWarnings( "deprecation" )
 	@Override
 	public IBlockState getActualState( IBlockState state, IBlockAccess world, BlockPos pos )
 	{
@@ -155,6 +159,7 @@ public class BlockController extends AEBaseTileBlock
 		return state.getValue( CONTROLLER_STATE ).ordinal();
 	}
 
+	@SuppressWarnings( "deprecation" )
 	@Override
 	public IBlockState getStateFromMeta( final int meta )
 	{
@@ -168,6 +173,7 @@ public class BlockController extends AEBaseTileBlock
 		return BlockRenderLayer.CUTOUT;
 	}
 
+	@SuppressWarnings( "deprecation" )
 	@Override
 	public void neighborChanged( IBlockState state, World world, BlockPos pos, Block blockIn, BlockPos fromPos )
 	{

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

@@ -60,9 +60,9 @@ public class BlockEnergyCell extends AEBaseTileBlock
 
 	@Override
 	@SideOnly( Side.CLIENT )
-	public void getSubBlocks( final Item item, final CreativeTabs tabs, final NonNullList<ItemStack> itemStacks )
+	public void getSubBlocks( final CreativeTabs tabs, final NonNullList<ItemStack> itemStacks )
 	{
-		super.getSubBlocks( item, tabs, itemStacks );
+		super.getSubBlocks( tabs, itemStacks );
 
 		final ItemStack charged = new ItemStack( this, 1 );
 		final NBTTagCompound tag = Platform.openNbtData( charged );