espocrm-base/application/Espo/Resources/metadata/fields/multiEnum.json

{
   "params":[
      {
         "name": "required",
         "type": "bool",
         "default": false
      },
      {
         "name":"options",
         "type":"array"
      },
      {
         "name":"translation",
         "type":"varchar",
         "hidden": true
      }
   ],
   "filter": false,
   "notCreatable": false,
   "fieldDefs":{
      "type":"jsonArray"
   }
}