Fix Submodule

src/api/java/net/minecraft/block/state/IBlockState.java

@@ -0,0 +1,23 @@
+package net.minecraft.block.state;
+
+import com.google.common.collect.ImmutableMap;
+import java.util.Collection;
+import net.minecraft.block.Block;
+import net.minecraft.block.properties.IProperty;
+
+/** This code is owned by Minecraft */
+
+public interface IBlockState
+{
+    Collection<IProperty> getPropertyNames();
+
+    <T extends Comparable<T>> T getValue(IProperty<T> property);
+
+    <T extends Comparable<T>, V extends T> IBlockState withProperty(IProperty<T> property, V value);
+
+    <T extends Comparable<T>> IBlockState cycleProperty(IProperty<T> property);
+
+    ImmutableMap<IProperty, Comparable> getProperties();
+
+    Block getBlock();
+}