def memoize_method(method_name, freezer)
      memoized_methods[method_name] = Memoizable::MethodBuilder
        .new(self, method_name, freezer).call
    end
def memoize_method(method_name, freezer)
      memoized_methods[method_name] = Memoizable::MethodBuilder
        .new(self, method_name, freezer).call
    end
Memoize the named method

 @param [Symbol] method_name
   a method name to memoize
 @param [#call] freezer
   a callable object to freeze the value

 @return [undefined]

 @api private