As you know twig template engine new feature has been added in 3.x by opencart team
Issue is sometimes when you install a new extension or make modifications and changes doesn't reflect due to twig cache and you become frustrate that why changes are not reflecting. you need to clear it then your changes made.
To solve this problem, I developed an extension that clear cache of twig.
INSTALL: very simple just plug and play
1-login to admin > extensions > installer > upload zip file
2- extension > modifications > refresh
Support and installation is free firstname.lastname@example.org
Clear Cache Twig 3.x
- Product Code: ISO
- Availability: In Stock
- Ex Tax: $20
- Price in reward points: 100