@Test
    fun isTopLevelFunction() {
        val libSource = Source.kotlin(
            "lib.kt",
            """
            @com.airbnb.android.showkase.processor.models.MyAnnotation
            fun foo() {}
            
            class Bar {
                fun enclosedFoo() {}
            }
            """.trimIndent()
        )
        runProcessorTest(listOf(libSource)) { invocation ->
            val barClass = invocation.processingEnv.requireTypeElement("Bar")

            expectThat(barClass.getDeclaredMethods()
                .single())
                .get { enclosingElement.type }
                .isNotNull()

            expectThat(invocation.roundEnv.getElementsAnnotatedWith(MyAnnotation::class))
                .single()
                .isA<XMethodElement>()
                 // This fails
                .get { enclosingElement.type }
                .isNull()
        }
    }

XMemberContainer