diff --git a/pkg/ds/interfaces.go b/pkg/ds/interfaces.go
index 3fa54cd..153ac30 100644
--- a/pkg/ds/interfaces.go
+++ b/pkg/ds/interfaces.go
@@ -46,18 +46,19 @@ type Product[S1 Set[S1], S2 Set[S2]] interface {
 	// Partitions returns a slice of pairs such that, for (p Product):
 	// 	  p.Equal(Union(CartesianPairLeft(s1, s2) for _, (s1, s2) := range p.Partitions())
 	// (note that the order is arbitrary; we do not return HashSet because Pair is not Hashable)
+	// Partitions returns a slice of pairs in the product set  (note that the order is arbitrary)
 	Partitions() []Pair[S1, S2]
 
 	// NumPartitions returns len(Partitions()). It is different from Size() which should return the number of concrete pairs of elements.
 	NumPartitions() int
 
-	// Left returns the projection of Product[S1, S2] on the set S1. If the product is empty, it returns the empty set.
+	// Left returns the left projection from pairs in the product set on S1, given input of an empty set in S1.
 	Left(empty S1) S1
 
-	// Right returns the projection of Product[S1, S2] on the set S2. If the product is empty, it returns the empty set.
+	// Right returns the right projection from pairs in the product set S2, given input of an empty set in S2.
 	Right(empty S2) S2
 
-	// Swap returns a new Product object, built from the receiver object, with left and right swapped
+	// Swap returns a new Product object, built from the input object, with left and right swapped.
 	Swap() Product[S2, S1]
 }
 
diff --git a/pkg/netset/connectionset_test.go b/pkg/netset/connectionset_test.go
index ec83e27..d053591 100644
--- a/pkg/netset/connectionset_test.go
+++ b/pkg/netset/connectionset_test.go
@@ -1,11 +1,18 @@
+/*
+Copyright 2023- IBM Inc. All Rights Reserved.
+
+SPDX-License-Identifier: Apache-2.0
+*/
+
 package netset_test
 
 import (
 	"testing"
 
+	"github.com/stretchr/testify/require"
+
 	"github.com/np-guard/models/pkg/connection"
 	"github.com/np-guard/models/pkg/netset"
-	"github.com/stretchr/testify/require"
 )
 
 func TestConnectionSetBasicOperations(t *testing.T) {
@@ -36,5 +43,4 @@ func TestConnectionSetBasicOperations(t *testing.T) {
 	// basic IsEmpty test
 	require.False(t, conn1.IsEmpty())
 	require.True(t, netset.NewConnectionSet().IsEmpty())
-
 }