/**
* Get contact by customer id
* @param string $customerId
* @return Contact
*/
public function getByCustomerId($customerId)
{
return $this->connector->getByNamedId('Contact', 'customer_id', $customerId);
}
/**
* Get invoice by invoice number
* @param string $invoiceId
* @return Invoice
*/
public function getByInvoiceId($invoiceId)
{
return $this->connector->getByNamedId('Invoice', 'invoice_id', $invoiceId);
}
