public function getSourceMediaFileId(): \Psr\Http\Message\UriInterface
    {
        if (!$this->sourceMediaFileId) {
            return new Uri();
        }

        return $this->sourceMediaFileId;
    }
public function getSourceMediaFileId(): \Psr\Http\Message\UriInterface
    {
        if (!$this->sourceMediaFileId) {
            return new Uri();
        }

        return $this->sourceMediaFileId;
    }
public function getSourceMediaFileId ( ) : \ Psr \ Http \ Message \ UriInterface { if ( ! $ this -> sourceMediaFileId ) { return new Uri ( ) ; } return $ this -> sourceMediaFileId ; }
Returns the id of the source MediaFile object that this file was generated from.

@return \Psr\Http\Message\UriInterface
Returns the id of the source MediaFile object that this file was generated from .