allout-widgets-icons-cacheallout-widgets-icons-cache is a variable defined in `
allout-widgets.el'. Its value is
nilDocumentation: Cache allout icon images, as an association list. `allout-fetch-icon-image' uses this cache transparently, keying images with lists containing the name of the icon directory (as found on the `load-path') and the icon name. Set this variable to `nil' to empty the cache, and have it replenish from the filesystem.