celluloid/celluloid — pull request #62 by Burgestrand (2012-07-26 22:37:45+00:00)
Title: Missing parameter “include_private” to respond_to? for ActorProxy

Please excuse my boldness opening an issue without a proper discussion
beforehand. Aaanyway…

Ruby’s own objects include this parameter (1), which when set to true also
takes into account private methods when looking up if the object responds
to the given method or not.

(1): http://ruby-doc.org/core-1.9.3/Object.html#method-i-respond_to-3F