src/XQueue/Maileon/API/Mailings/MailingsService.php
function updateCustomProperty($mailingId, $property) {

        $queryParameters = array(
            'name' => $property->key,
            'value' => $property->value
        );

        return $this->put("mailings/${mailingId}/settings/properties", "", $queryParameters);
    }
function updateCustomProperty($mailingId, $property) {

        $queryParameters = array(
            'name' => $property->key,
            'value' => $property->value
        );

        return $this->put("mailings/${mailingId}/settings/properties", "", $queryParameters);
    }
Updates a custom property of the mailing with the provided id.

@param int $mailingId
@param com_maileon_api_mailings_CustomProperty $property
@return com_maileon_api_MaileonAPIResult