import com.sun.xml.internal.bind.Locatable; //导入依赖的package包/类
public boolean run(
    Outline outline,
    Options opt,
    ErrorHandler errorHandler ) {

    for( ClassOutline ci : outline.getClasses() ) {
        JDefinedClass impl = ci.implClass;
        if (ci.getSuperClass() == null) {
            JVar $loc = impl.field(JMod.PROTECTED, Locator.class, fieldName);
            $loc.annotate(XmlLocation.class);
            $loc.annotate(XmlTransient.class);

            impl._implements(Locatable.class);

            impl.method(JMod.PUBLIC, Locator.class, "sourceLocation").body()._return($loc);

            JMethod setter = impl.method(JMod.PUBLIC, Void.TYPE, "setSourceLocation");
            JVar $newLoc = setter.param(Locator.class, "newLocator");
            setter.body().assign($loc, $newLoc);
        }
    }

    return true;
}