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

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

        return $this->programId;
    }
public function getProgramId ( ) : \ Psr \ Http \ Message \ UriInterface { if ( ! $ this -> programId ) { return new Uri ( ) ; } return $ this -> programId ; }
Returns the ID of the Program that represents this media. The GUID URI is recommended.

@return \Psr\Http\Message\UriInterface
Returns the ID of the Program that represents this media . The GUID URI is recommended .