That would be really nice if workflow-cps-global-lib-plugin allow subfolders in vars/ directory.

At this time it doesn't seem to traverse a directory tree when rebuilding its list : https://github.com/jenkinsci/workflow-cps-global-lib-plugin/blob/master/src/main/java/org/jenkinsci/plugins/workflow/cps/global/UserDefinedGlobalVariableList.java#L39

I'm working on a library with a lot of variables and that would be easier to maintain if I could sort them in subfolders like this : 

(root)
+- src                   
|   +- org
|       +- foo
|           +- Bar.groovy 
+- vars
|   +- folder1
|   |   +-varOne.groovy         
|   |   +-varTwo.groovy
|   |
|   +- folder2
|       +- varThree.groovy          
|