/**
* @param null|CustomersFilter $data
* @return null|void
*/
public function customers($data = null)
{
$action = 'customers';
$postMainParameters = null;
if ($data instanceof CustomersFilter) {
$this->addMainParameter($data->getId());
$this->addSecondaryParameter('search_string', $data->getSearchString());
$this->addSecondaryParameter('search_field', $data->getSearchField());
$this->addSecondaryParameter('page_size', $data->getPageSize());
$this->addSecondaryParameter('page', $data->getPage());
$this->addSecondaryParameter('sort_fields', $data->getSortFields());
$this->addSecondaryParameter('columns', $data->getColumns());
$this->addSecondaryParameter('extend', $data->getExtend());
} elseif (is_int($data)) {
$this->addMainParameter($data);
}
$response = $this->call($action, $postMainParameters);
$result = $this->handleResponse($response);
return $result;
}