Based on available information, does not appear to be a widely documented software feature or a known public dataset. Instead, the filename suggests it is a compressed archive (using the 7-Zip format) likely created for a specific local project, personal collection, or private distribution.
The "helpful feature" you are looking for likely refers to one of the following contexts depending on where you encountered the file: ChristmasTreats22.7z
Could you clarify or what software or community it is associated with? Knowing the context will help identify exactly what "feature" it provides. Based on available information, does not appear to