Creating multiple targets

I know it can be silly , but I'm stuck almost 2 weeks on it ... Couldn't find any answer , maybe I'm just stupid ...

I have one project with multiple targets , I can duplicated the targets , rename it and create group with some files

label_group = project.main_group.find_subpath('WhiteLabel/'+target.name, true);

project['WhiteLabel/' + target.name].new_file('480.json');
project['WhiteLabel/' + target.name].new_file( target.name+'-Info.plist');
project['WhiteLabel/' + target.name].new_file(target.name+'.xcassets');

But it not create a real folder with real files , just references ...

Anyone can tell me , what I am doing wrong , or if there is a better way to do it ?

Thanks a million !

Start with the project.main_group.find_subpath and new_file calls shown in the issue, then trace how Xcodeproj represents groups, file references, and physical files. Confirm whether the API supports creating real folders and files rather than references; done means documenting or implementing a working approach for multiple targets.

Written by the indexing model from the issue text.