plugin stopped recognizing arb files' contents

[VadimOsovsky]

tons of constants suddenly became useless...
very buggy plugin, some of the features like string extraction don't work at all.
the issues are hardly ever reviewed
terrible experience

kotlin.KotlinNullPointerException
	at eu.long1.flutter.i18n.workers.I18nFileGenerator.generate(I18nFileGenerator.kt:57)
	at eu.long1.flutter.i18n.workers.Initializer$runActivity$$inlined$scheduleAtFixedRate$1$lambda$1$1.compute(actions.kt:74)
	at com.intellij.openapi.application.impl.ApplicationImpl.lambda$runWriteAction$19(ApplicationImpl.java:1065)
	at com.intellij.openapi.application.impl.ApplicationImpl.runWriteActionWithClass(ApplicationImpl.java:1021)
	at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:1065)
	at eu.long1.flutter.i18n.workers.Initializer$runActivity$$inlined$scheduleAtFixedRate$1$lambda$1.run(Initializer.kt:286)
	at com.intellij.openapi.application.TransactionGuardImpl$2.run(TransactionGuardImpl.java:315)
	at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.doRun(LaterInvocator.java:435)
	at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.runNextEvent(LaterInvocator.java:419)
	at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.run(LaterInvocator.java:403)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:764)
	at java.awt.EventQueue.access$500(EventQueue.java:98)
	at java.awt.EventQueue$3.run(EventQueue.java:715)
	at java.awt.EventQueue$3.run(EventQueue.java:709)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:734)
	at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:757)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:706)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:375)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)