IDEA-67951 Suggest comparator type in Collections.sort()

java/java-tests/testData/codeInsight/completion/smartType/NoWrongSubstitutorFromStats-out.java

@@ -0,0 +1,16 @@
+import java.util.Comparator;
+import java.util.List;
+import java.util.Collections;
+
+public class Foo {
+    private List<String> myList;
+
+    private void sort() {
+        Collections.sort(myList, new Comparator<String>() {
+            @Override
+            public int compare(String o1, String o2) {
+                <selection>return 0;  //To change body of implemented methods use File | Settings | File Templates.</selection>
+            }
+        });
+    }
+}

java/java-tests/testData/codeInsight/completion/smartType/NoWrongSubstitutorFromStats.java

@@ -0,0 +1,10 @@
+import java.util.List;
+import java.util.Collections;
+
+public class Foo {
+    private List<String> myList;
+
+    private void sort() {
+        Collections.sort(myList, new Comparator<caret>);
+    }
+}