target->required_features.glsl_version = stage.required_features.glsl_version;
for(NodeList<Statement>::iterator i=stage.content.body.begin(); i!=stage.content.body.end(); ++i)
target->content.body.push_back(*i);
target->required_features.glsl_version = stage.required_features.glsl_version;
for(NodeList<Statement>::iterator i=stage.content.body.begin(); i!=stage.content.body.end(); ++i)
target->content.body.push_back(*i);