old_contents: /* @flow */
  
  const useLSP = atom.config.get('flow-ide.useLSP')
  
  // possible improvement: check if flow really supports lsp
  
  if (useLSP === true) {
    // eslint-disable-next-line global-require
    const { FlowLanguageClient } = require('./language-client')
    module.exports = new FlowLanguageClient()
  } else {
    // eslint-disable-next-line global-require
    const { Flow } = require('./index')
    module.exports = new Flow()
  }
  
new_contents: /* @flow */
  
  const useLSP = atom.config.get('flow-ide.useLSP')
  
  // notify to restart if the value changes
  atom.config.onDidChange('flow-ide.useLSP', () => {
    const buttons = [{
      text: 'Restart',
      onDidClick () { return atom.restartApplication() },
    }]
    atom.notifications.addInfo('Changing this value requires a restart of atom.', { dismissable: true, buttons })
  })
  
  // possible improvement: check if flow really supports lsp
  
  if (useLSP === true) {
    // eslint-disable-next-line global-require
    const { FlowLanguageClient } = require('./language-client')
    module.exports = new FlowLanguageClient()
  } else {
    // eslint-disable-next-line global-require
    const { Flow } = require('./index')
    module.exports = new Flow()
  }
  
subject: Add notification to restart atom when switching to/from LSP