mark testonly back to discourage usage

platform/configuration-store-impl/src/StoreAwareProjectManager.kt

@@ -158,7 +158,7 @@ class StoreAwareProjectManager(virtualFileManager: VirtualFileManager, progressM
   }
 
   override fun flushChangedProjectFileAlarm() {
-    changedFilesAlarm.flush()
+    changedFilesAlarm.drainRequestsInTest()
   }
 
   override fun reloadProject(project: Project) {

platform/platform-api/src/com/intellij/util/Alarm.java

@@ -255,7 +255,8 @@ public class Alarm implements Disposable {
     return count;
   }
 
-  public void flush() {
+  @TestOnly
+  public void drainRequestsInTest() {
     List<Runnable> unfinishedTasks;
     synchronized (LOCK) {
       if (myRequests.isEmpty()) {

platform/platform-impl/src/com/intellij/openapi/wm/impl/status/EditorBasedStatusBarPopup.java

@@ -174,18 +174,18 @@ public abstract class EditorBasedStatusBarPopup extends EditorBasedWidget implem
   @TestOnly
   public void updateInTests(boolean immediately) {
     update();
-    update.flush();
+    update.drainRequestsInTest();
     UIUtil.dispatchAllInvocationEvents();
     if (immediately) {
       // for widgets with background activities, the first flush() adds handlers to be called
-      update.flush();
+      update.drainRequestsInTest();
       UIUtil.dispatchAllInvocationEvents();
     }
   }
 
   @TestOnly
   public void flushUpdateInTests() {
-    update.flush();
+    update.drainRequestsInTest();
   }
 
   public void update() {

platform/platform-tests/testSrc/com/intellij/util/AlarmTest.java

@@ -151,7 +151,7 @@ public class AlarmTest extends PlatformTestCase {
     alarm.addRequest(() -> sb.append("1"), 0, ModalityState.NON_MODAL);
     alarm.addRequest(() -> sb.append("2"), 5, ModalityState.NON_MODAL);
     assertEquals("", sb.toString());
-    alarm.flush();
+    alarm.drainRequestsInTest();
     assertEquals("12", sb.toString());
   }