import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Verify.verify;
-import com.google.common.base.Optional;
import com.google.common.base.Throwables;
import com.google.common.base.Verify;
import com.google.common.cache.CacheBuilder;
import com.google.common.util.concurrent.UncheckedExecutionException;
import java.lang.reflect.Type;
import java.util.List;
+import java.util.Optional;
import org.opendaylight.mdsal.binding.spec.naming.BindingMapping;
import org.opendaylight.mdsal.binding.spec.reflect.BindingReflections;
import org.opendaylight.yangtools.util.ClassLoaderUtils;