public CompletableFuture<Void> deleteGroup(Group group, DeletionCause cause) {
        return future(() -> {
            this.implementation.deleteGroup(group);
            this.plugin.getEventDispatcher().dispatchGroupDelete(group, cause);
        });
    }
Provides a {@link CompletableFuture} based API for interacting with a {@link StorageImplementation}.
common/src/main/java/me/lucko/luckperms/common/storage/Storage.java