gistfile1.txt

get() could include try/catch. 
Inside would fetch from iBL and parse response.
Parse can throw errors from each errored process inside _parseResponse().
Remove handleErrors() and _getIblError, add _parseResponse().
Response is moved to instance var (debatable, would give object a state).
checkJsonError does not throw anything unless finds an error.
Below an example, not complete:


private function _parseResponse() {
  $body = $this->_fetchBody();
  $json = $this->_parseJsonBody($body);
  $this->_checkForJsonError($json);
}
    
  _private function _checkForJsonError($json) {
    if (isset($json->error, $json->error->details)) {
        $message = isset($json->error->id)
            ? sprintf("[%s] %s", $json->error->id, $json->error->details)
            : $json->error->details;
        throw BBC_Service_Bamboo_Exception_JsonError($message);
    }
  }
  
  _private function _fetchBody() {
    $body = $this->_response->getBody();
    if (!$body) {
      throw BBC_Service_Bamboo_Exception_NoBodyContent;
    }
    return $body;
  }
  
  _private function _parseJsonBody($body) {
    try {
      return json_decode($body);
    } catch (Exception $e) {
      throw BBC_Service_Bamboo_Exception_JsonParseError($e);
    }
  }