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java.lang.NullPointerException
java.lang.NullPointerException: 	at com.intellij.openapi.command.WriteCommandAction.performWriteCommandAction(WriteCommandAction.java:106)	at com.intellij.openapi.command.WriteCommandAction.access$000(WriteCommandAction.java:33)	at com.intellij.openapi.command.WriteCommandAction$1.run(WriteCommandAction.java:80)	at com.intellij.openapi.command.WriteCommandAction.execute(WriteCommandAction.java:85)	at com.intellij.testFramework.fixtures.impl.HeavyIdeaTestFixtureImpl.a(HeavyIdeaTestFixtureImpl.java:148)	at com.intellij.testFramework.fixtures.impl.HeavyIdeaTestFixtureImpl.setUp(HeavyIdeaTestFixtureImpl.java:102)	at com.intellij.testFramework.fixtures.impl.CodeInsightTestFixtureImpl$18.run(CodeInsightTestFixtureImpl.java:1123)	at com.intellij.testFramework.fixtures.impl.CodeInsightTestFixtureImpl$18.run(CodeInsightTestFixtureImpl.java:1127)	at com.intellij.util.ui.UIUtil.invokeAndWaitIfNeeded(UIUtil.java:2074)	at com.intellij.testFramework.fixtures.impl.CodeInsightTestFixtureImpl.setUp(CodeInsightTestFixtureImpl.java:1119)	at com.intellij.testFramework.fixtures.JavaCodeInsightFixtureTestCase.setUp(JavaCodeInsightFixtureTestCase.java:57)	at com.intellij.testFramework.UsefulTestCase.defaultRunBare(UsefulTestCase.java:340)	at com.intellij.testFramework.UsefulTestCase$3.run(UsefulTestCase.java:353)	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:199)	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:672)	at java.awt.EventQueue.access$400(EventQueue.java:81)	at java.awt.EventQueue$2.run(EventQueue.java:633)	at java.awt.EventQueue$2.run(EventQueue.java:631)	at java.security.AccessController.doPrivileged(Native Method)	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)	at java.awt.EventQueue.dispatchEvent(EventQueue.java:642)	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)	at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)