import { Command } from 'substance' class TrackChangeControlCommand extends Command { getCommandState (params) { const newState = { disabled: false, active: false } return newState } execute (params, context) { const surface = context.surfaceManager.getSurface('body') surface.send('trackChangesUpdate') return true } } TrackChangeControlCommand.type = 'track-change-enable' export default TrackChangeControlCommand