This is only for FG_1.2(for minecraft 1.7.10). Minecraft mod development framework used by Forge and FML for the gradle build system
[Here](https://github.com/anatawa12/ForgeGradle-1.2/blob/9f771fde8633b396daa9cc69a2ab383c0ea4d2f4/src/main/java/net/minecraftforge/gradle/tasks/user/reobf/ObfArtifact.java#L371) forgegradle sets copyEmptyDirectories to false that causes SpecialSource not add directory entries to obfuscated jar, this causes getResource to return null on folders in mods (for example, WarpDrive checks if directory exists with getResource [here](https://github.com/LemADEC/WarpDrive/blob/90abf4fcde95537419275a2beb30fc8ec3fbb27b/src/main/java/cr0s/warpdrive/block/TileEntityAbstractInterfaced.java#L103))
This issue appears to be discussing a feature request or bug report related to the repository. Based on the content, it seems to be resolved. The issue was opened by iocmet and has received 5 comments.