[Suggestion] Properties vs Class variables

[ppaulojr]

@interface DoxDialerCaller() {
    NSURL *_dialerSchemeURL;
    NSURL *_openDialerInAppStoreURL;
    UIImage *_dialerIcon;
    UIImage *_dialerIconAsTemplate;
}

While I like class variables I believe the use o _ before the name can be misleading because the "convention" is to name properties in this way.