src/Leevel/Database/Ddd/Meta.php
public static function instance(string $table): IMeta
    {
        if (!isset(static::$instances[$table])) {
            return static::$instances[$table] = new static($table);
        }

        return static::$instances[$table];
    }
public static function instance(string $table): IMeta
    {
        if (!isset(static::$instances[$table])) {
            return static::$instances[$table] = new static($table);
        }

        return static::$instances[$table];
    }
返回数据库元对象

@param string $table

@return $this