fix

pkgs/jnigen/test/simple_package_test/runtime_test_registrant.dart

diff --git a/pkgs/jnigen/test/simple_package_test/runtime_test_registrant.dart b/pkgs/jnigen/test/simple_package_test/runtime_test_registrant.dart
index 7cac264..cc036de 100644
--- a/pkgs/jnigen/test/simple_package_test/runtime_test_registrant.dart
+++ b/pkgs/jnigen/test/simple_package_test/runtime_test_registrant.dart
@@ -719,7 +719,7 @@
         });
 
         group('Interface implementation on destroyed isolate', () {
-          Future<void> _waitUntilCollected(MyConsumerRunner runner) async {
+          Future<void> waitUntilCollected(MyConsumerRunner runner) async {
             for (var i = 0; i < 8; ++i) {
               if (i > 0) {
                 await Future<void>.delayed(
@@ -758,7 +758,7 @@
             isolate.kill(priority: Isolate.immediate);
             await exitPort.first;
 
-            await _waitUntilCollected(runner);
+            await waitUntilCollected(runner);
             expect(runner.isArgCollected, isTrue);
           });
 
@@ -793,7 +793,7 @@
             );
 
             // Arg is cleaned up even though message isn't delivered.
-            await _waitUntilCollected(runner);
+            await waitUntilCollected(runner);
             expect(runner.isArgCollected, isTrue);
           });
 
@@ -830,7 +830,7 @@
             );
 
             // Arg is cleaned up even though message isn't delivered.
-            await _waitUntilCollected(runner);
+            await waitUntilCollected(runner);
             expect(runner.isArgCollected, isTrue);
           });
 
@@ -860,7 +860,7 @@
             isolate.kill(priority: Isolate.immediate);
             await exitPort.first;
 
-            await _waitUntilCollected(runner);
+            await waitUntilCollected(runner);
             expect(runner.isArgCollected, isTrue);
           });
 
@@ -895,7 +895,7 @@
             );
 
             // Arg is cleaned up even though message isn't delivered.
-            await _waitUntilCollected(runner);
+            await waitUntilCollected(runner);
             expect(runner.isArgCollected, isTrue);
           });
 
@@ -932,7 +932,7 @@
             );
 
             // Arg is cleaned up even though message isn't delivered.
-            await _waitUntilCollected(runner);
+            await waitUntilCollected(runner);
             expect(runner.isArgCollected, isTrue);
           });
         }, skip: !canRunJavaGC || !canDoGC);