reveal (BlankSlate)

        # File lib/blankslate.rb, line 38
    38:     def reveal(name)
    39:       bound_method = nil
    40:       unbound_method = find_hidden_method(name)
    41:       fail "Don't know how to reveal method '#{name}'" unless unbound_method
    42:       define_method(name) do |*args|
    43:         bound_method ||= unbound_method.bind(self)
    44:         bound_method.call(*args)
    45:       end
    46:     end