'context-menu':
   'atom-text-editor': [
     {
       'label': 'Toggle hello-world'
       'command': 'hello-world:toggle'
     }
   ]
 'menu': [
   {
     'label': 'Packages'
     'submenu': [
       'label': 'hello-world'
       'submenu': [
         {
           'label': 'Toggle'
           'command': 'hello-world:toggle'
         }
       ]
     ]
   }
 ]