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

group 

        # PrettyPrint::SingleLine.group

(from ruby core)
### Implementation from SingleLine
---
    group(indent=nil, open_obj='', close_obj='', open_width=nil, close_width=nil) { || ... }

---

Opens a block for grouping objects to be pretty printed.

Arguments:
*   `indent` - noop argument. Present for compatibility.
*   `open_obj` - text appended before the &blok. Default is ''
*   `close_obj` - text appended after the &blok. Default is ''
*   `open_width` - noop argument. Present for compatibility.
*   `close_width` - noop argument. Present for compatibility.

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.