feat(diagnostic): add missing functions
feat(diagnostic): add missing functions

closes #743

ramonornela/ionic-native,ramonornela/ionic-native,ramonornela/ionic-native,xueron/ionic-native,driftyco/ionic-native,klirix/ionic-native,driftyco/ionic-native,ramonornela/ionic-native,klirix/ionic-native,xueron/ionic-native,xueron/ionic-native,klirix/ionic-native,driftyco/ionic-native,xueron/ionic-native