--- a/src/luan/LuanCloner.java	Tue Feb 12 22:53:57 2019 -0700
+++ b/src/luan/LuanCloner.java	Thu Feb 14 03:10:45 2019 -0700
@@ -1,7 +1,7 @@
 package luan;
 
 import java.util.Map;
-import java.util.HashMap;
+import java.util.Collection;
 import java.util.IdentityHashMap;
 
 
@@ -10,6 +10,7 @@
 
 	public final Type type;
 	private final Map cloned = new IdentityHashMap();
+	private Luan luan = null;
 
 	public LuanCloner(Type type) {
 		this.type = type;
@@ -20,6 +21,11 @@
 			return null;
 		LuanCloneable rtn = (LuanCloneable)cloned.get(obj);
 		if( rtn == null ) {
+			if( obj instanceof Luan ) {
+				if( luan != null )
+					throw new RuntimeException("2 luans in "+type+" "+this+" - "+luan+" "+obj);
+				luan = (Luan)obj;
+			}
 			rtn = obj.shallowClone();
 			cloned.put(obj,rtn);
 			obj.deepenClone(rtn,this);
@@ -42,11 +48,15 @@
 	}
 
 	public Map clone(Map obj) {
-		if( !obj.getClass().equals(HashMap.class) )
-			throw new RuntimeException("can only clone HashMap");
 		Map rtn = (Map)cloned.get(obj);
 		if( rtn == null ) {
-			rtn = new HashMap();
+			try {
+				rtn = obj.getClass().newInstance();
+			} catch(InstantiationException e) {
+				throw new RuntimeException(e);
+			} catch(IllegalAccessException e) {
+				throw new RuntimeException(e);
+			}
 			for( Object stupid : obj.entrySet() ) {
 				Map.Entry entry = (Map.Entry)stupid;
 				rtn.put( get(entry.getKey()), get(entry.getValue()) );
@@ -55,6 +65,23 @@
 		return rtn;
 	}
 
+	public Collection clone(Collection obj) {
+		Collection rtn = (Collection)cloned.get(obj);
+		if( rtn == null ) {
+			try {
+				rtn = obj.getClass().newInstance();
+			} catch(InstantiationException e) {
+				throw new RuntimeException(e);
+			} catch(IllegalAccessException e) {
+				throw new RuntimeException(e);
+			}
+			for( Object entry : (Collection)obj ) {
+				rtn.add( get(entry) );
+			}
+		}
+		return rtn;
+	}
+
 	public Object get(Object obj) {
 		if( obj instanceof LuanCloneable )
 			return clone((LuanCloneable)obj);
@@ -62,6 +89,8 @@
 			return clone((Object[])obj);
 		if( obj instanceof Map )
 			return clone((Map)obj);
+		if( obj instanceof Collection )
+			return clone((Collection)obj);
 		return obj;
 	}
 }