import static org.mockito.Mockito.mock;
import com.google.common.base.Converter;
-import com.google.common.base.Optional;
import com.google.common.base.VerifyException;
import com.google.common.collect.BiMap;
import com.google.common.collect.HashBiMap;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
+import java.util.Optional;
import javax.xml.xpath.XPathExpressionException;
import org.jaxen.Context;
import org.jaxen.Function;