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

deprecate_constant 

        # Module.deprecate_constant

(from ruby core)
---
    mod.deprecate_constant(symbol, ...)    => mod

---

Makes a list of existing constants deprecated. Attempt to refer to them
will produce a warning.

    module HTTP
      NotFound = Exception.new
      NOT_FOUND = NotFound # previous version of the library used this name

      deprecate_constant :NOT_FOUND
    end

    HTTP::NOT_FOUND
    # warning: constant HTTP::NOT_FOUND is deprecated

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.