private static function isNullable(string $table, string $column): bool
    {
        // IF the nullables cache is not already built, THEN build it!
        if (self::$nullablesCache === null || !array_key_exists($table, self::$nullablesCache))
            self::getNullables($table);

        // Return TRUE if the column is included in the nullables cache!
        return array_key_exists($column, self::$nullablesCache[$table]);
    }