gistfile1.txt

[1] pry(main)> cd ActionDispatch::Request
[2] pry(ActionDispatch::Request):1> show-method headers

From: /Users/charliemelbye/.rvm/gems/ruby-2.1.0/gems/actionpack-3.2.16/lib/action_dispatch/http/request.rb @ line 126:
Owner: ActionDispatch::Request
Visibility: public
Number of lines: 3

def headers
  Http::Headers.new(@env)
end
[3] pry(ActionDispatch::Request):1> cd Http::Headers
Error: Bad object path: Http::Headers. Failed trying to resolve: Http::Headers. #<NameError: uninitialized constant HTTP::Headers>
[4] pry(ActionDispatch::Request):1> Http::Headers.new
NameError: uninitialized constant HTTP::Headers
from (pry):1:in `__binding__'