/**
* Clone will return identical deep copy of this valueObject.
* Note, that this method is different than the clone() which
* is defined in java.lang.Object. Here, the retuned cloned object
* will also have all its attributes cloned.
*/
function cloneObject()
{
$cloned = new Cursos();
$cloned->setId($this->id);
$cloned->setFoto($this->foto);
$cloned->setDescripcion($this->descripcion);
$cloned->setFecha_lim($this->fecha_lim);
$cloned->setHorario($this->horario);
return $cloned;
}