/**
* The deleteCampaign method checks if a campaign ID exists and
* modifies the details for the campaign if it exists or returns an error
* message, as appropriate.
*
* @access public
*
* @param string $sessionId
* @param integer $campaignId
*
* @return boolean
*/
function deleteCampaign($sessionId, $campaignId)
{
if ($this->verifySession($sessionId)) {
return $this->_validateResult($this->_dllCampaign->delete($campaignId));
} else {
return false;
}
}