This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.
# OpenSSL::SSL::SSLContext.session_remove_cb (from ruby core) --- A callback invoked when a session is removed from the internal cache. The callback is invoked with an SSLContext and a Session. IMPORTANT NOTE: It is currently not possible to use this safely in a multi-threaded application. The callback is called inside a global lock and it can randomly cause deadlock on Ruby thread switching.
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.