lambda <-> anonymous <-> method ref: collapse lambda block when applicable refactored (IDEA-134509)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/anonymous2lambda/afterValueVoidCompatibleAmbiguity.java

@@ -5,7 +5,9 @@ import java.util.Set;
 class Test {
   public static void main(String[] args) {
     Set<String> strings = new HashSet<>();
-    new Test().query((ResultSet var1) -> strings.add("Col1"));
+    new Test().query(var1 -> {
+      return strings.add("Col1");
+    });
   }
 
   public void query(RowCallbackHandler rch){

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/anonymous2lambda/afterVoidValueTransformation.java

@@ -0,0 +1,9 @@
+// "Replace with lambda" "true"
+import javax.swing.*;
+class Test {
+  String c = null;
+
+  public void main(String[] args){
+    SwingUtilities.invokeLater(() -> c.substring(0).toString());
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/anonymous2lambda/beforeVoidValueTransformation.java

@@ -0,0 +1,13 @@
+// "Replace with lambda" "true"
+import javax.swing.*;
+class Test {
+  String c = null;
+
+  public void main(String[] args){
+    SwingUtilities.invokeLater(new Runna<caret>ble() {
+      public void run() {
+        c.substring(0).toString();
+      }
+    });
+  }
+}