import com.google.common.base.Function;
import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
-import com.google.common.collect.*;
+import com.google.common.collect.Collections2;
+import com.google.common.collect.HashMultimap;
+import com.google.common.collect.Multimap;
+import com.google.common.collect.Sets;
import org.opendaylight.controller.config.yang.store.api.YangStoreException;
import org.opendaylight.controller.config.yang.store.api.YangStoreListenerRegistration;
import org.opendaylight.controller.config.yang.store.api.YangStoreService;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Enumeration;
+import java.util.List;
+import java.util.Set;
/**
* Note on consistency: