I have a groupBy function in Typescript that is responsible to group array objects by a key from every array:

export const groupBy = <T, K extends string>(array: T[], key: K): Record<K, T> => {


  return array.reduce((acc, item) => {

    if (!acc[key]) {
      acc[key] = []
    }

    acc[key].push(item)

    return acc
  }, {} as Record<K, T[]>)
}

const arr = [{name: "Car"}, {name: 'Color'}, {name: 'Car'}]

interface Data {
  name: string
}

const res = groupBy<Data[], 'Car' | 'Color'>(arr, 'name')
console.log(res)

What i want to achive is next:

1. To be able to add the array type
2. To be able to add the keys as
   union type
3. To get the code suggestion when i will consume the result

I added all types for that but i still get a TS error here (const res = groupBy<Data[], ‘Car’ | ‘Color’>(arr, ‘name’)
):

Argument of type '{ name: string; }[]' is not assignable to parameter of type 'Data[][]'.
  Type '{ name: string; }' is missing the following properties from type 'Data[]': length, pop, push, concat, and 26 more.(2345)
const arr: {
    name: string;
}[]

How to fix the types to not get any errors?