Pick A helper to pick by object's props. Usage import type {Pick} from 'flown' ;({a: 1, b: 2}: Pick<{ a: 1, b: 2 }, ['a', 'b']>) ;({a: 1, b: undefined}: Pick<{ a: 1, b: 2 }, ['a']>) ;({a: undefined, b: undefined}: Pick<{ a: 1, b: 2 }, ['c']>)