File basedir = new File( "/test/path" );
Model model = new Model();
Dependency dep = new Dependency();
dep.setSystemPath( "${basedir}/artifact.jar" );
model.addDependency( dep );
ModelInterpolator interpolator = createInterpolator();
final SimpleProblemCollector collector = new SimpleProblemCollector();
Model result = interpolator.interpolateModel( model, basedir, createModelBuildingRequest(context), collector );