# File lib/em/callback.rb, line 47
  def self.Callback(object = nil, method = nil, &blk)
    if object && method
      lambda { |*args| object.__send__ method, *args }
    else
      if object.respond_to? :call
        object
      else
        blk || raise(ArgumentError)
      end # if
    end # if
  end