public void apply(Consumer<ConfigurationNode> action) throws IOException {
            apply(false, false, action);
        }
Flat-file storage using Configurate {@link ConfigurationNode}s.
The data for users/groups/tracks is stored in a single shared file.
common/src/main/java/me/lucko/luckperms/common/storage/implementation/file/CombinedConfigurateStorage.java