// OS should ignore this request if the app is currently not the active one.
void next();
// To know if the OS supports IME switching or not.
// Use case: let the keyboard app knows if it is necessary to show the "IME switching"
// (globe) button. We have a use case that when there is only one IME enabled, we
// should not show the globe icon.
boolean supportsSwitching();
// Ask the OS to hide the current active Keyboard app. (was: |removeFocus()|)