/// migrate((app) => { const collection = app.findCollectionByNameOrId("pbc_1568971955") // add field collection.fields.addAt(14, new Field({ "hidden": false, "id": "bool3523658193", "name": "private", "presentable": false, "required": false, "system": false, "type": "bool" })) return app.save(collection) }, (app) => { const collection = app.findCollectionByNameOrId("pbc_1568971955") // remove field collection.fields.removeById("bool3523658193") return app.save(collection) })