extract method: new signature detector (IDEA-66281); initial

java/java-tests/testData/refactoring/extractMethod/SuggestChangeSignatureOneParam_after.java

@@ -0,0 +1,14 @@
+public class Test {
+    {
+        int x = 0;
+
+        newMethod(x, "foo");
+
+        newMethod(x, "bar");
+    }
+
+    private void newMethod(int x, String foo) {
+        System.out.println(foo);
+        System.out.println(x);
+    }
+}