import net.minecraft.block.BlockNewLeaf; //导入依赖的package包/类
private static void registerVanillaVariantProps() {
	// TODO: omit similar blocks
	registerVariantProperty(BlockStone.VARIANT);
	registerVariantProperty(BlockPlanks.VARIANT);
	registerVariantProperty(BlockSapling.TYPE);
	registerVariantProperty(BlockDirt.VARIANT);
	registerVariantProperty(BlockSand.VARIANT);
	registerVariantProperty(BlockOldLog.VARIANT);
	registerVariantProperty(BlockNewLog.VARIANT);
	registerVariantProperty(BlockOldLeaf.VARIANT);
	registerVariantProperty(BlockNewLeaf.VARIANT);
	registerVariantProperty(BlockSandStone.TYPE);
	registerVariantProperty(BlockTallGrass.TYPE);
	registerVariantProperty(BlockPistonExtension.TYPE);
	registerVariantProperty(BlockColored.COLOR);
	registerVariantProperty(BlockPistonMoving.TYPE);
	registerVariantProperty(Blocks.YELLOW_FLOWER.getTypeProperty());
	registerVariantProperty(Blocks.RED_FLOWER.getTypeProperty());
	registerVariantProperty(BlockStoneSlab.VARIANT);
	registerVariantProperty(BlockWoodSlab.VARIANT);
	registerVariantProperty(BlockAnvil.DAMAGE);
	registerVariantProperty(BlockQuartz.VARIANT);
	registerVariantProperty(BlockCarpet.COLOR);
	registerVariantProperty(BlockDoublePlant.VARIANT);
	registerVariantProperty(BlockStainedGlass.COLOR);
	registerVariantProperty(BlockStainedGlassPane.COLOR);
	registerVariantProperty(BlockPrismarine.VARIANT);
	registerVariantProperty(BlockRedSandstone.TYPE);
	registerVariantProperty(BlockStoneSlabNew.VARIANT);
}
 

import net.minecraft.block.BlockNewLeaf; //导入依赖的package包/类
public static MetaBlock get(Wood type, boolean decay){
	
	Block base = getBlockId(type);
	
	MetaBlock leaf = new MetaBlock(base);
	
	// Original minecraft leaves use a different variant property than
	// newer leaves like acacia and dark oak.
	if(base == Blocks.LEAVES){
		leaf.withProperty(BlockOldLeaf.VARIANT, getType(type));	
	} else {
		leaf.withProperty(BlockNewLeaf.VARIANT, getType(type));
	}
	
	leaf.withProperty(BlockLeaves.DECAYABLE, decay);
	
	return leaf;
	
}