[fixes #2261] Detect static method access properly

test/transform/resource/after-ecj/ExtensionMethodNames.java

@@ -0,0 +1,32 @@
+package a;
+import lombok.experimental.ExtensionMethod;
+@ExtensionMethod(Extensions.class) class ExtensionMethodNames {
+  ExtensionMethodNames() {
+    super();
+  }
+  public void instanceCalls() {
+    a.Extensions.ext(new Test());
+    Test t = new Test();
+    a.Extensions.ext(t);
+    Test Test = new Test();
+    a.Extensions.ext(Test);
+  }
+  public void staticCalls() {
+    Test.ext();
+    a.Test.ext();
+  }
+}
+class Extensions {
+  Extensions() {
+    super();
+  }
+  public static void ext(Test t) {
+  }
+}
+class Test {
+  Test() {
+    super();
+  }
+  public static void ext() {
+  }
+}