Issue 21978. Put function 'main' first when sorting members.

editor/tools/plugins/com.google.dart.engine.services_test/src/com/google/dart/engine/services/internal/correction/MembersSorterTest.java

Index: editor/tools/plugins/com.google.dart.engine.services_test/src/com/google/dart/engine/services/internal/correction/MembersSorterTest.java
diff --git a/editor/tools/plugins/com.google.dart.engine.services_test/src/com/google/dart/engine/services/internal/correction/MembersSorterTest.java b/editor/tools/plugins/com.google.dart.engine.services_test/src/com/google/dart/engine/services/internal/correction/MembersSorterTest.java
index d613ef1ac383643fea221e23ed3a5ec89954f3d1..c7c61cfc45c7b85092d19885d9768747ed0ea9ff 100644
--- a/editor/tools/plugins/com.google.dart.engine.services_test/src/com/google/dart/engine/services/internal/correction/MembersSorterTest.java
+++ b/editor/tools/plugins/com.google.dart.engine.services_test/src/com/google/dart/engine/services/internal/correction/MembersSorterTest.java
@@ -436,6 +436,24 @@ public class MembersSorterTest extends RefactoringImplTest {
     assertSorting(initial, expected);
   }
 
+  public void test_unitMembers_mainFirst() throws Exception {
+    String initial = makeSource(//
+        "class C {}",
+        "aaa() {}",
+        "class A {}",
+        "main() {}",
+        "class B {}",
+        "");
+    String expected = makeSource(//
+        "main() {}",
+        "aaa() {}",
+        "class A {}",
+        "class B {}",
+        "class C {}",
+        "");
+    assertSorting(initial, expected);
+  }
+
   public void test_unitMembers_mix() throws Exception {
     verifyNoTestUnitErrors = false;
     String initial = makeSource(//