core-bundle/src/Resources/contao/library/Contao/DcaExtractor.php
public static function getInstance($strTable)
	{
		if (!isset(static::$arrInstances[$strTable]))
		{
			static::$arrInstances[$strTable] = new static($strTable);
		}

		return static::$arrInstances[$strTable];
	}
public static function getInstance($strTable)
	{
		if (!isset(static::$arrInstances[$strTable]))
		{
			static::$arrInstances[$strTable] = new static($strTable);
		}

		return static::$arrInstances[$strTable];
	}
Get one object instance per table

@param string $strTable The table name

@return DcaExtractor The object instance