IDEA-CR-3497 it's better to use verb in method name to make it clearer what it does, i.e. it would be better to rename this method to 'runWriteAction'.

add javadoc to avoid "exposes Function0 class from Kotlin stdlib to public API, it's forbidden for now"

platform/built-in-server/testSrc/TestManager.kt

@@ -1,7 +1,7 @@
 package org.jetbrains.ide
 
 import com.intellij.openapi.application.invokeAndWaitIfNeed
-import com.intellij.openapi.application.writeAction
+import com.intellij.openapi.application.runWriteAction
 import com.intellij.openapi.roots.ModuleRootManager
 import com.intellij.openapi.roots.ModuleRootModificationUtil
 import com.intellij.openapi.util.io.FileUtilRt
@@ -68,7 +68,7 @@ class TestManager(val projectFixture: IdeaProjectTestFixture) : TestWatcher() {
       val normalizedFilePath = FileUtilRt.toSystemIndependentName(filePath!!)
       if (annotation!!.relativeToProject) {
         val root = projectFixture.getProject().getBaseDir()
-        writeAction {
+        runWriteAction {
           fileToDelete = root.findOrCreateChildData(this@TestManager, normalizedFilePath)
         }
       }
@@ -77,7 +77,7 @@ class TestManager(val projectFixture: IdeaProjectTestFixture) : TestWatcher() {
           ModuleRootModificationUtil.updateModel(projectFixture.getModule()) { model ->
             val contentEntry = model.getContentEntries()[0]
             val contentRoot = contentEntry.getFile()!!
-            writeAction {
+            runWriteAction {
               contentRoot.findChild(EXCLUDED_DIR_NAME)?.delete(this@TestManager)
               fileToDelete = contentRoot.createChildDirectory(this@TestManager, EXCLUDED_DIR_NAME)
               fileToDelete!!.createChildData(this@TestManager, normalizedFilePath)
@@ -89,7 +89,7 @@ class TestManager(val projectFixture: IdeaProjectTestFixture) : TestWatcher() {
         }
         else {
           val root = ModuleRootManager.getInstance(projectFixture.getModule()).getSourceRoots()[0]
-          writeAction {
+          runWriteAction {
             fileToDelete = root.findOrCreateChildData(this@TestManager, normalizedFilePath)
           }
         }
@@ -103,7 +103,7 @@ class TestManager(val projectFixture: IdeaProjectTestFixture) : TestWatcher() {
     }
 
     if (fileToDelete != null) {
-      invokeAndWaitIfNeed { writeAction { fileToDelete?.delete(this@TestManager) } }
+      invokeAndWaitIfNeed { runWriteAction { fileToDelete?.delete(this@TestManager) } }
       fileToDelete = null
     }
 

platform/core-impl/src/com/intellij/openapi/application/actions.kt

@@ -17,7 +17,10 @@ package com.intellij.openapi.application
 
 import javax.swing.SwingUtilities
 
-public inline fun writeAction(runnable: () -> Unit) {
+/**
+ * @exclude Internal use only
+ */
+public inline fun runWriteAction(runnable: () -> Unit) {
   val token = WriteAction.start()
   try {
     runnable()
@@ -27,6 +30,9 @@ public inline fun writeAction(runnable: () -> Unit) {
   }
 }
 
+/**
+ * @exclude Internal use only
+ */
 public fun invokeAndWaitIfNeed(runnable: () -> Unit) {
   val app = ApplicationManager.getApplication()
   if (app == null) {

platform/platform-impl/src/com/intellij/openapi/options/SchemeManagerImpl.kt

@@ -19,7 +19,7 @@ import com.intellij.openapi.application.AccessToken
 import com.intellij.openapi.application.ApplicationManager
 import com.intellij.openapi.application.WriteAction
 import com.intellij.openapi.application.ex.DecodeDefaultsUtil
-import com.intellij.openapi.application.writeAction
+import com.intellij.openapi.application.runWriteAction
 import com.intellij.openapi.components.RoamingType
 import com.intellij.openapi.components.ServiceManager
 import com.intellij.openapi.components.impl.stores.DirectoryBasedStorage
@@ -527,7 +527,8 @@ public class SchemeManagerImpl<T : Scheme, E : ExternalizableScheme>(private val
       if (renamed) {
         file = dir.findChild(externalInfo!!.fileName)
         if (file != null) {
-          writeAction {
+          runWriteAction {  }
+          runWriteAction {
             file!!.rename(this, fileName)
           }
         }
@@ -537,7 +538,7 @@ public class SchemeManagerImpl<T : Scheme, E : ExternalizableScheme>(private val
         file = DirectoryBasedStorage.getFile(fileName, dir, this)
       }
 
-      writeAction {
+      runWriteAction {
         file!!.getOutputStream(this).use {
           byteOut.writeTo(it)
         }