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

source_location 

        # Proc.source_location

(from ruby core)
---
    prc.source_location  -> [String, Integer]

---

Returns the Ruby source filename and line number containing this proc or
`nil` if this proc was not defined in Ruby (i.e. native).

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.