Q: How to "pin" casks?

[furrnace]

Output of brew config

HOMEBREW_VERSION: 3.6.16-97-ge76c55e
ORIGIN: https://github.com/Homebrew/brew
HEAD: e76c55e18434c870cca1de7aadf9d5218271fe2d
Last commit: 3 days ago
Core tap ORIGIN: https://github.com/Homebrew/homebrew-core
Core tap HEAD: ea788fea6fdd42ad6daaf11767c9d7ca2dddc853
Core tap last commit: 86 minutes ago
Core tap branch: master
HOMEBREW_PREFIX: /usr/local
HOMEBREW_CASK_OPTS: []
HOMEBREW_DISPLAY: /private/tmp/com.apple.launchd.Ne7H69Qp4k/org.xquartz:0
HOMEBREW_MAKE_JOBS: 8
Homebrew Ruby: 2.6.8 => /usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.6.8_1/bin/ruby
CPU: octa-core 64-bit ivybridge
Clang: 12.0.0 build 1200
Git: 2.24.3 => /Applications/Xcode.app/Contents/Developer/usr/bin/git
Curl: 7.64.1 => /usr/bin/curl
macOS: 10.15.7-x86_64
CLT: 12.0.0.32.29
Xcode: 12.4

Output of brew doctor

very long output, possibly because using macOS: 10.15.7-x86_64

Description of issue

I know how to use the pin command for formulae.
Is there an equivalent command for casks?

[p-linnane]

This is not possible or supported.