def acl=(acl)
      validator = EnumAttributeValidator.new('String', ["public", "private"])
      unless validator.valid?(acl)
        fail ArgumentError, "invalid value for 'acl', must be one of #{validator.allowable_values}."
      end
      @acl = acl
    end
def acl=(acl)
      validator = EnumAttributeValidator.new('String', ["public", "private"])
      unless validator.valid?(acl)
        fail ArgumentError, "invalid value for 'acl', must be one of #{validator.allowable_values}."
      end
      @acl = acl
    end
Custom attribute writer method checking allowed values (enum).
 @param [Object] acl Object to be assigned