What is the 'intellij_project' folder for?
In a Java project, I find that there are a .idea folder and a intellij_project folder. I understand that .idea holds the meta-information of the project. What is the intellij_project folder for? Should it be committed to VCS?
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What files does it contain? Was your project imported from Eclipse or generated using some third-party tools?
Stock IDEA doesn't create this folder, unless someone has specified to use this folder for certain files when creating this project or modules.
Indeed it was a custom created folder.