replace with collect: collapse lambda to method reference in filters (IDEA-151491)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/streamApiMigration/afterCompactFilterToMethodReference.java

@@ -0,0 +1,10 @@
+// "Replace with collect" "true"
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class A {
+    private void withStream(List<String> stream, final List<String> activeFilters) {
+        activeFilters.addAll(stream.stream().filter(String::isEmpty).collect(Collectors.toList()));
+    }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/streamApiMigration/beforeCompactFilterToMethodReference.java

@@ -0,0 +1,12 @@
+// "Replace with collect" "true"
+
+import java.util.List;
+
+public class A {
+    private void withStream(List<String> stream, final List<String> activeFilters) {
+        for (String filter : st<caret>ream)
+            if (filter.isEmpty()) {
+              activeFilters.add(filter);
+            }
+    }
+}