Make core libraries use generic method syntax.

tests/isolate/isolate.status

Index: tests/isolate/isolate.status
diff --git a/tests/isolate/isolate.status b/tests/isolate/isolate.status
index 22a15a1c84de0c07cbbd11656a29027ad31f21df..7a921a0ac3a6d1b0fd916abf0373197fb567df3d 100644
--- a/tests/isolate/isolate.status
+++ b/tests/isolate/isolate.status
@@ -160,6 +160,37 @@ browser/package_*: Skip # Issue 25594 (missing implementation in Dartium).
 browser/typed_data_message_test: StaticWarning
 mint_maker_test: StaticWarning
 
+# Issue #28236
+browser/compute_this_script_browser_test: StaticWarning
+browser/package_resolve_browser_hook2_test: StaticWarning
+browser/package_resolve_browser_hook_test: StaticWarning
+browser/package_resolve_browser_test: StaticWarning
+count_test: StaticWarning
+cross_isolate_message_test: StaticWarning
+deferred_in_isolate2_test: StaticWarning
+illegal_msg_function_test: StaticWarning
+illegal_msg_mirror_test: StaticWarning
+isolate_complex_messages_test: StaticWarning
+mandel_isolate_test: StaticWarning
+message2_test: StaticWarning
+message_test: StaticWarning
+nested_spawn2_test: StaticWarning
+nested_spawn_test: StaticWarning
+raw_port_test: StaticWarning
+request_reply_test: StaticWarning
+spawn_function_custom_class_test: StaticWarning
+spawn_function_test: StaticWarning
+spawn_uri_multi_test/01: StaticWarning
+spawn_uri_multi_test/none: StaticWarning
+spawn_uri_nested_vm_test: StaticWarning
+spawn_uri_test: StaticWarning
+spawn_uri_vm_test: StaticWarning
+stacktrace_message_test: StaticWarning
+static_function_test: StaticWarning
+timer_isolate_test: StaticWarning
+unresolved_ports_test: StaticWarning
+
+
 [ $compiler == none && $runtime == vm ]
 scenarios/short_package/short_package_test: Fail, OK  # We do not plan to support the tested behavior anyway.