This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.
# OpenSSL::X509::Store.error_string (from ruby core) --- The description for the error code set by the last call of #verify. See also StoreContext#error_string.
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.