diff --git a/src/main/java/lanchon/multidexlib2/AbstractMultiDexContainer.java b/src/main/java/lanchon/multidexlib2/AbstractMultiDexContainer.java
index 35108f4..f6ec8b5 100644
--- a/src/main/java/lanchon/multidexlib2/AbstractMultiDexContainer.java
+++ b/src/main/java/lanchon/multidexlib2/AbstractMultiDexContainer.java
@@ -43,15 +43,6 @@ public abstract class AbstractMultiDexContainer<T extends DexFile> implements Mu
 		return entryMap.get(entryName);
 	}
 
-	/*
-	public Opcodes getNewestOpcodes() {
-		Opcodes opcodes = null;
-		for (String entryName : getDexEntryNames()) {
-			opcodes = OpcodeUtils.getNewestOpcodes(opcodes, getEntry(entryName).getOpcodes(), true);
-		}
-	}
-	*/
-
 	protected DuplicateEntryNameException throwDuplicateEntryName(String entryName) {
 		throw new DuplicateEntryNameException(entryName);
 	}
diff --git a/src/main/java/lanchon/multidexlib2/OpcodeUtils.java b/src/main/java/lanchon/multidexlib2/OpcodeUtils.java
index 6afa9e4..0ce6974 100644
--- a/src/main/java/lanchon/multidexlib2/OpcodeUtils.java
+++ b/src/main/java/lanchon/multidexlib2/OpcodeUtils.java
@@ -33,6 +33,16 @@ public class OpcodeUtils {
 		return o1.api >= o2.api ? o1 : o2;
 	}
 
+	/*
+	public static <T extends DexFile> Opcodes getNewestOpcodes(MultiDexContainer<T> container) throws IOException {
+		Opcodes opcodes = null;
+		for (String entryName : container.getDexEntryNames()) {
+			opcodes = OpcodeUtils.getNewestOpcodes(opcodes, container.getEntry(entryName).getOpcodes(), true);
+		}
+		return opcodes;
+	}
+	*/
+
 	private static IllegalArgumentException undefinedApiLevel() {
 		return new IllegalArgumentException("Opcodes instance has undefined api level");
 	}