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java.lang.NullPointerException: 	at org.eclipse.xtext.ide.server.LanguageServerImpl.translateKind(LanguageServerImpl.java:466)	at org.eclipse.xtext.ide.server.LanguageServerImpl.toCompletionItem(LanguageServerImpl.java:458)	at org.eclipse.xtext.ide.server.LanguageServerImpl.lambda$null$39(LanguageServerImpl.java:433)	at org.eclipse.xtext.xbase.lib.internal.FunctionDelegate.apply(FunctionDelegate.java:42)	at com.google.common.collect.Iterators$8.transform(Iterators.java:817)	at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:48)	at com.google.common.collect.Iterators.addAll(Iterators.java:365)	at com.google.common.collect.Lists.newArrayList(Lists.java:162)	at com.google.common.collect.Lists.newArrayList(Lists.java:146)	at org.eclipse.xtext.xbase.lib.IterableExtensions.toList(IterableExtensions.java:555)	at org.eclipse.xtext.ide.server.LanguageServerImpl.lambda$completion$40(LanguageServerImpl.java:436)	at org.eclipse.xtext.ide.server.concurrent.RequestManager.lambda$runRead$53(RequestManager.java:129)	at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1590)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)