Fixed stairs

src/api/java/appeng/api/definitions/IItemDefinition.java

@@ -1,14 +1,22 @@
 package appeng.api.definitions;
 
 
+import javax.annotation.Nonnull;
+
+import com.google.common.base.Optional;
+
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
 
-import com.google.common.base.Optional;
-
 
 public interface IItemDefinition extends IComparableDefinition
 {
+	/**
+	 * @return the unique name of the definition which will be used to register the underlying structure. Will never be null
+	 */
+	@Nonnull
+	String identifier();
+
 	/**
 	 * @return the {@link Item} Implementation if applicable
 	 */

src/api/java/appeng/api/definitions/IMaterials.java

@@ -123,7 +123,7 @@ public interface IMaterials
 
 	IItemDefinition woodenGear();
 
-	IItemDefinition wireless();
+	IItemDefinition wirelessReceiver();
 
 	IItemDefinition wirelessBooster();