class ActionDispatch::Request

fall back to Object#method
For debugging purposes, when called with arguments this method will

more information.
even if it was overridden by middleware. See #request_method for
Returns the original value of the environment's REQUEST_METHOD,

def method(*args)
  if args.empty?
    @method ||= check_method(
      get_header("rack.methodoverride.original_method") ||
      get_header("REQUEST_METHOD")
    )
  else
    super
  end
end