diff --git a/jps/model/src/org/jetbrains/ether/dependencyView/IntIntPersistentMultiMaplet.java b/jps/model/src/org/jetbrains/ether/dependencyView/IntIntPersistentMultiMaplet.java
index 181d6ccb6d98..4c1224a7c2b3 100644
--- a/jps/model/src/org/jetbrains/ether/dependencyView/IntIntPersistentMultiMaplet.java
+++ b/jps/model/src/org/jetbrains/ether/dependencyView/IntIntPersistentMultiMaplet.java
@@ -78,7 +78,7 @@ class IntIntPersistentMultiMaplet extends IntIntMultiMaplet {
   public void replace(int key, TIntHashSet value) {
     try {
       myCache.remove(key);
-      if (value == null || value.size() == 0) {
+      if (value == null || value.isEmpty()) {
         myMap.remove(key);
       }
       else {
diff --git a/jps/model/src/org/jetbrains/ether/dependencyView/IntIntTransientMultiMaplet.java b/jps/model/src/org/jetbrains/ether/dependencyView/IntIntTransientMultiMaplet.java
index a88f27ef5641..b92bbc5d7922 100644
--- a/jps/model/src/org/jetbrains/ether/dependencyView/IntIntTransientMultiMaplet.java
+++ b/jps/model/src/org/jetbrains/ether/dependencyView/IntIntTransientMultiMaplet.java
@@ -56,7 +56,7 @@ class IntIntTransientMultiMaplet extends IntIntMultiMaplet {
 
   @Override
   public void replace(int key, TIntHashSet value) {
-    if (value == null || value.size() == 0) {
+    if (value == null || value.isEmpty()) {
       myMap.remove(key);
     }
     else {