singleton_method_removed

Invoked as a callback whenever a singleton method is removed from the receiver.

   module Chatty
     def Chatty.singleton_method_removed(id)
       puts "Removing #{id.id2name}"
     end
     def self.one()     end
     def two()          end
     def Chatty.three() end
     class <<self
       remove_method :three
       remove_method :one
     end
   end

produces:

   Removing three
   Removing one