src/main/java/org/intellimate/izou/sdk/frameworks/music/player/template/CommandHandler.java
public void setPlayPauseController(Consumer<String> controller) {
        if (controller == null)
            return;
        this.playPause = controller;
        capabilities.setPlayPauseControl(true);
    }
public void setPlayPauseController(Consumer<String> controller) {
        if (controller == null)
            return;
        this.playPause = controller;
        capabilities.setPlayPauseControl(true);
    }
adds the ability for the Play/Pause requests
@param controller  the controller for callback