Sort non_nullable_test.dart

Change-Id: I356b49fb64daf4245f936d795ccaad5b0588a408
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/103550
Reviewed-by: Brian Wilkerson <[email protected]>
Commit-Queue: Paul Berry <[email protected]>
Auto-Submit: Paul Berry <[email protected]>

Author: stereotype441

pkg/analyzer/test/src/dart/resolution/non_nullable_test.dart

@@ -26,18 +26,6 @@ class NonNullableTest extends DriverResolutionTest {
   @override
   bool get typeToStringWithNullability => true;
 
-  test_member_potentiallyNullable_called() async {
-    addTestFile(r'''
-m<T extends Function>() {
-  List<T?> x;
-  x.first();
-}
-''');
-    await resolveTestFile();
-    // Do not assert no test errors. Deliberately invokes nullable type.
-    assertType(findNode.methodInvocation('first').methodName, 'Function?');
-  }
-
   test_local_getterNullAwareAccess_interfaceType() async {
     addTestFile(r'''
 m() {
@@ -207,6 +195,18 @@ class A<T> {
     assertType(findNode.typeName('T? b'), 'T?');
   }
 
+  test_member_potentiallyNullable_called() async {
+    addTestFile(r'''
+m<T extends Function>() {
+  List<T?> x;
+  x.first();
+}
+''');
+    await resolveTestFile();
+    // Do not assert no test errors. Deliberately invokes nullable type.
+    assertType(findNode.methodInvocation('first').methodName, 'Function?');
+  }
+
   test_null_assertion_operator_removes_nullability() async {
     addTestFile('''
 main() {