I am trying to write a function in typescript which validates that an object has certain properties and I got stuck at the very beginning do keys xyz exist? I tried to do that with the following code:

import _ from 'lodash/fp'; 

type Pred = (o: Object) => boolean

const required_keys: Pred[] = _.map(_.has,['id','field1'])
const validate: (o: Object) => boolean = _.overEvery(required_keys)

I expected that type of required_keys would be Pred[] but typescript LSP tells me it is boolean[]. I expected that after we apply one argument to _.has I still have to apply another one the object that that is being tested.

Am I wrong or is it LSP, and how can LSP and I come to an agreement?