GraphQL\Type\Introspection::_enumValue PHP Method

    public static function _enumValue()
    {
        if (!isset(self::$map['__EnumValue'])) {
            self::$map['__EnumValue'] = new ObjectType(['name' => '__EnumValue', 'description' => 'One possible value for a given Enum. Enum values are unique values, not ' . 'a placeholder for a string or numeric value. However an Enum value is ' . 'returned in a JSON response as a string.', 'fields' => ['name' => ['type' => Type::nonNull(Type::string())], 'description' => ['type' => Type::string()], 'isDeprecated' => ['type' => Type::nonNull(Type::boolean()), 'resolve' => function ($enumValue) {
                return !!$enumValue->deprecationReason;
            }], 'deprecationReason' => ['type' => Type::string()]]]);
        }
        return self::$map['__EnumValue'];
    }