When trying to build the app for iOS with Cordova (command line: cordova build ios), I get the following error: `VolumeSlider.m:23:34: error: no visible @interface for 'CDVPlugin' declares the selector 'initWithWebView:' self = (VolumeSlider*)[super initWithWebView:theWebView]; ~~~~~ ^~~~~~~~~~~~~~~ 1 error generated.` Am I doing something wrong? :) EDIT: using Cordova version 6.3.1 and ios Cordova platform version 4.2.1