diff -up universal-java-matrix-package-0.3.0/ujmp-core/src/main/java/org/ujmp/core/collections/composite/ListSet.java.p00 universal-java-matrix-package-0.3.0/ujmp-core/src/main/java/org/ujmp/core/collections/composite/ListSet.java
--- universal-java-matrix-package-0.3.0/ujmp-core/src/main/java/org/ujmp/core/collections/composite/ListSet.java.p00	2024-01-22 01:11:15.699877591 +0300
+++ universal-java-matrix-package-0.3.0/ujmp-core/src/main/java/org/ujmp/core/collections/composite/ListSet.java	2024-01-22 02:06:17.660712871 +0300
@@ -23,9 +23,15 @@
 
 package org.ujmp.core.collections.composite;
 
+import java.util.Comparator;
 import java.util.List;
 import java.util.Set;
+import java.util.Spliterator;
 
 public interface ListSet<T> extends List<T>, Set<T> {
+	@Override
+	public Spliterator<T> spliterator();
 
+	//@Override
+	//public Comparator<? super T> comparator();
 }
diff -up universal-java-matrix-package-0.3.0/ujmp-core/src/main/java/org/ujmp/core/collections/composite/SortedListSet.java.p00 universal-java-matrix-package-0.3.0/ujmp-core/src/main/java/org/ujmp/core/collections/composite/SortedListSet.java
--- universal-java-matrix-package-0.3.0/ujmp-core/src/main/java/org/ujmp/core/collections/composite/SortedListSet.java.p00	2024-01-22 01:14:23.428021493 +0300
+++ universal-java-matrix-package-0.3.0/ujmp-core/src/main/java/org/ujmp/core/collections/composite/SortedListSet.java	2024-01-22 02:01:59.123012066 +0300
@@ -32,6 +32,7 @@ import java.util.Iterator;
 import java.util.List;
 import java.util.ListIterator;
 import java.util.SortedSet;
+import java.util.Spliterator;
 import java.util.TreeSet;
 
 public class SortedListSet<A> extends AbstractList<A> implements SortedSet<A>, ListSet<A>,
@@ -44,6 +45,12 @@ public class SortedListSet<A> extends Ab
 	public SortedListSet() {
 	}
 
+	@Override
+	public Spliterator<A> spliterator()
+	{
+		return set.spliterator();
+	}
+
 	public Comparator<? super A> comparator() {
 		return set.comparator();
 	}