core-bundle/src/Resources/contao/library/Contao/Filter/SyncExclude.php
public function accept()
	{
		// The resource is to be ignored
		if (strncmp($this->current()->getFilename(), '.', 1) === 0)
		{
			return false;
		}

		$strPath = $this->current()->getPathname();

		if (is_file($strPath))
		{
			$strPath = \dirname($strPath);
		}

		$objFolder = new Folder(StringUtil::stripRootDir($strPath));

		return !$objFolder->isUnsynchronized();
	}
public function accept()
	{
		// The resource is to be ignored
		if (strncmp($this->current()->getFilename(), '.', 1) === 0)
		{
			return false;
		}

		$strPath = $this->current()->getPathname();

		if (is_file($strPath))
		{
			$strPath = \dirname($strPath);
		}

		$objFolder = new Folder(StringUtil::stripRootDir($strPath));

		return !$objFolder->isUnsynchronized();
	}
Check whether the current element of the iterator is acceptable

@return boolean True if the element is acceptable