/**
* Get if a learning material file path is valid
* @param LearningMaterialInterface $lm
*
* @return boolean
*/
public function checkLearningMaterialFilePath(LearningMaterialInterface $lm)
{
$relativePath = $lm->getRelativePath();
$fullPath = $this->getPath($relativePath);
return $this->fileSystem->exists($fullPath);
}
