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java.util.ArrayList cannot be cast to ceylon.language.Iterable
java.lang.ClassCastException: java.util.ArrayList cannot be cast to ceylon.language.Iterable	at com.redhat.ceylon.ide.common.model.IdeModule$11.$call$(IdeModule.ceylon:614)	at com.redhat.ceylon.ide.common.model.IdeModule$11.$call$(IdeModule.ceylon:613)	at com.redhat.ceylon.ide.common.model.IdeModule$10.$call$(IdeModule.ceylon:605)	at com.redhat.ceylon.ide.common.util.synchronize_.synchronize(synchronize_.java:33)	at com.redhat.ceylon.ide.common.model.IdeModule.doWithPhasedUnitsObject$priv$(IdeModule.ceylon:603)	at com.redhat.ceylon.ide.common.model.IdeModule.getPhasedUnits(IdeModule.ceylon:612)	at org.intellij.plugins.ceylon.ide.resolve.CeylonImplementationsSearch.findImplementors$priv$(CeylonImplementationsSearch.ceylon:93)	at org.intellij.plugins.ceylon.ide.resolve.CeylonImplementationsSearch.execute(CeylonImplementationsSearch.ceylon:53)	at org.intellij.plugins.ceylon.ide.resolve.CeylonImplementationsSearch.execute(CeylonImplementationsSearch.ceylon:48)	at com.intellij.util.ExecutorsQuery.processResults(ExecutorsQuery.java:45)	at com.intellij.util.AbstractQuery.forEach(AbstractQuery.java:79)	at com.intellij.util.UniqueResultsQuery.process(UniqueResultsQuery.java:66)