return true;
return !(extension != null ? !extension.equals(that.extension) : that.extension != null);
    public boolean equals(Object o) {        if (this == o) return true;        if (o == null || getClass() != o.getClass()) return false;        final PhoneDevice that = (PhoneDevice) o;        if (callerId != null ? !callerId.equals(that.callerId) : that.callerId != null) return false;        if (device != null ? !device.equals(that.device) : that.device != null) return false;        if (extension != null ? !extension.equals(that.extension) : that.extension != null) return false;        if (id != null ? !id.equals(that.id) : that.id != null) return false;        if (monitored != null ? !monitored.equals(that.monitored) : that.monitored != null) return false;        if (primary != null ? !primary.equals(that.primary) : that.primary != null) return false;        return true;    }