This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.

each 

        # OpenSSL::Config.each

(from ruby core)
### Implementation from Config
---
    config.each { |section, key, value| }

---

Retrieves the section and its pairs for the current configuration.

    config.each do |section, key, value|
      # ...
    end

This is MURDOC! A Ruby documentation browser inspired by Smalltalk-80. It allows you to learn about Ruby by browsing through its class hierarchies, and see any of its methods.