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java.lang.NullPointerException: 	at com.github.kumaraman21.intellijbehave.resolver.DeclaredAnnotationSet.(DeclaredAnnotationSet.java:48)	at com.github.kumaraman21.intellijbehave.resolver.StepPsiReference$StepAnnotationFinder.processFile(StepPsiReference.java:89)	at com.intellij.openapi.roots.impl.FileIndexImplUtil$1.visitFile(FileIndexImplUtil.java:38)	at com.intellij.openapi.vfs.VfsUtilCore.visitChildrenRecursively(VfsUtilCore.java:170)	at com.intellij.openapi.vfs.VfsUtilCore.visitChildrenRecursively(VfsUtilCore.java:182)	at com.intellij.openapi.vfs.VfsUtilCore.visitChildrenRecursively(VfsUtilCore.java:182)	at com.intellij.openapi.vfs.VfsUtilCore.visitChildrenRecursively(VfsUtilCore.java:182)	at com.intellij.openapi.vfs.VfsUtilCore.visitChildrenRecursively(VfsUtilCore.java:182)	at com.intellij.openapi.vfs.VfsUtilCore.visitChildrenRecursively(VfsUtilCore.java:182)	at com.intellij.openapi.vfs.VfsUtilCore.visitChildrenRecursively(VfsUtilCore.java:182)	at com.intellij.openapi.vfs.VfsUtilCore.visitChildrenRecursively(VfsUtilCore.java:182)	at com.intellij.openapi.vfs.VfsUtilCore.visitChildrenRecursively(VfsUtilCore.java:162)	at com.intellij.openapi.roots.impl.FileIndexImplUtil.iterateRecursively(FileIndexImplUtil.java:33)	at com.intellij.openapi.roots.impl.ProjectFileIndexImpl.iterateContent(ProjectFileIndexImpl.java:71)	at com.github.kumaraman21.intellijbehave.resolver.StepPsiReference.resolve(StepPsiReference.java:60)	at com.github.kumaraman21.intellijbehave.codeInspector.UnusedStepsInspection$1.visitElement(UnusedStepsInspection.java:101)	at com.intellij.psi.JavaElementVisitor.visitAnnotation(JavaElementVisitor.java:340)	at com.intellij.psi.impl.source.tree.java.PsiAnnotationImpl.accept(PsiAnnotationImpl.java:111)	at com.intellij.codeInsight.daemon.impl.LocalInspectionsPass.a(LocalInspectionsPass.java:403)	at com.intellij.codeInsight.daemon.impl.LocalInspectionsPass.a(LocalInspectionsPass.java:361)	at com.intellij.codeInsight.daemon.impl.LocalInspectionsPass.access$100(LocalInspectionsPass.java:76)	at com.intellij.codeInsight.daemon.impl.LocalInspectionsPass$2.process(LocalInspectionsPass.java:327)	at com.intellij.codeInsight.daemon.impl.LocalInspectionsPass$2.process(LocalInspectionsPass.java:309)	at com.intellij.concurrency.JobUtil$2$1.run(JobUtil.java:117)	at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:218)	at com.intellij.concurrency.JobUtil$2.process(JobUtil.java:115)	at com.intellij.concurrency.JobUtil$1.run(JobUtil.java:57)	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)	at java.util.concurrent.FutureTask.run(FutureTask.java:166)	at com.intellij.concurrency.PrioritizedFutureTask.access$101(PrioritizedFutureTask.java:31)	at com.intellij.concurrency.PrioritizedFutureTask$1.run(PrioritizedFutureTask.java:70)	at com.intellij.openapi.application.impl.ApplicationImpl.tryRunReadAction(ApplicationImpl.java:1053)	at com.intellij.concurrency.PrioritizedFutureTask.run(PrioritizedFutureTask.java:97)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)	at java.lang.Thread.run(Thread.java:722)