/**
* An explicit update. The reason for this is that for an update the number
* of required properties is different that of an insert.
*
* Required properties: EmailAddress, SubscriberKey, or ID.
*
* @return boolean
* @throws Exception
*/
public function update()
{
$this->checkRequiredProperties($this->requiredUpdateProperties);
$this->checkRequiredAttributes();
$objects = array($this->makeSoapVar());
$result = ETCore::update($objects);
ETCore::evaluateSoapResult($result);
$this->clearModified();
return true;
}
