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import {viewOr, lensProp} from 'rambda'
const input = {a: 1}interface Input {  a: number,  b?: number,}const lens = lensProp<Input, 'b'>('b')
describe('R.viewOr', () => {  it('require explicit types', () => {    const result = viewOr<Input, number>(4, lens, input)
    result // $ExpectType number  })  it('curry 1', () => {    const result = viewOr<Input, number>(4, lens)(input)
    result // $ExpectType number  })  it('curry 2', () => {    const result = viewOr<Input, number>(4)(lens)(input)
    result // $ExpectType number  })})