understand

Install command: 
brew install --cask understand

Name: SciTools Understand

Code visualization and exploration tool

https://scitools.com/features

Cask JSON API: /api/cask/understand.json

Cask code: understand.rb on GitHub

Current version: 7.1.1221

Current version requires: macOS >= 10.11

Analytics:

Installs (30 days)
understand 7
Installs (90 days)
understand 21
Installs (365 days)
understand 84
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