Local endpoint added successful and negative ownerId implemented

mROA.Test/Identifier.cs

@@ -0,0 +1,23 @@
+using mROA.Implementation;
+
+namespace mROA.Test;
+
+[TestFixture]
+public class Identifier
+{
+    [Test]
+    public void TestParse()
+    {
+        var id = new ComplexObjectIdentifier(-1, -1);
+        var flat = id.Flat;
+        var next = new ComplexObjectIdentifier { Flat = flat };
+        if (id.Equals(next))
+        {
+            Assert.Pass();
+        }
+        else
+        {
+            Assert.Fail();
+        }
+    }
+}