It automatically generates install.xml file from storage/modification folder. You need to add comment for effective file generation. Details can be found at:
- In php file there must be a comment Like:
//ocmod [extension_name] replace
//ocmod [extension_name] before
//ocmod [extension_name] after
- In twig file comment can be
<!-- ocmod [extension_name] replace -->
<!-- ocmod [extension_name] before -->
<!-- ocmod [extension_name] after -->