def configuration_block_delegate(*methods)
      methods.flatten.each { |m| cf_block_delegators.add(m.to_sym) }
      @cb_conf_module = nil if @cb_conf_module
      nil
    end
def configuration_block_delegate(*methods)
      methods.flatten.each { |m| cf_block_delegators.add(m.to_sym) }
      @cb_conf_module = nil if @cb_conf_module
      nil
    end
This DSL method is intended to be used in a class or module to indicate which methods
 should be delegated.

 @param methods [Array<Symbol,String>] list of method names
 @return [nil]