// Get method retrieves an heartbeat with details from OpsGenie.
func (cli *OpsGenieHeartbeatClient) Get(req heartbeat.GetHeartbeatRequest) (*heartbeat.GetHeartbeatResponse, error) {
	req.APIKey = cli.apiKey
	resp, err := cli.sendRequest(cli.buildGetRequest(getHeartbeatURL, req))

	if resp == nil {
		return nil, err
	}
	defer resp.Body.Close()

	var getHeartbeatResp heartbeat.GetHeartbeatResponse
	if err = resp.Body.FromJsonTo(&getHeartbeatResp); err != nil {
		message := "Server response can not be parsed, " + err.Error()
		logging.Logger().Warn(message)
		return nil, errors.New(message)
	}

	return &getHeartbeatResp, nil
}