@Test
 public void enclosingClassName() throws Exception {
   assertThat(Convert.enclosingClassName("MyClass")).isEqualTo("");
   assertThat(Convert.enclosingClassName("MyClass$InnerClass")).isEqualTo("MyClass");
   assertThat(Convert.enclosingClassName("MyClass$$InnerClass$class")).isEqualTo("MyClass$");
   assertThat(Convert.enclosingClassName("MyClass$$InnerClass$")).isEqualTo("MyClass$");
 }