code: function(config) {
  
  		if (config) {
  			if (config.check_property_names === false) this._check_property_names = false;
  		}
  
  		this._serializeFunction = (config && config.pretty_print_functions)
  			? this._serializeFunction_PrettyPrint
  			: this._serializeFunction_Normal
  
  	}
docs: Create Serializer instance
  @param {?_cSerializer} config