*/
package org.opendaylight.controller.blueprint.ext;
-import com.google.common.base.Optional;
import com.google.common.base.Strings;
import com.google.common.io.Resources;
import java.io.IOException;
import java.io.InputStream;
import java.net.URISyntaxException;
import java.net.URL;
+import java.util.Optional;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.stream.XMLStreamException;
import org.opendaylight.mdsal.binding.dom.codec.api.BindingNormalizedNodeSerializer;