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

+ 

        # Time.+

(from ruby core)
---
    time + numeric -> time

---

Adds some number of seconds (possibly including subsecond) to *time* and
returns that value as a new Time object.

    t = Time.now         #=> 2020-07-20 22:14:43.170490982 +0900
    t + (60 * 60 * 24)   #=> 2020-07-21 22:14:43.170490982 +0900

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.