// before
let x: { hello: string, world: string };

// after
interface NewType {
    hello: string;
    world: string;
}

let x: NewType;

// before
let x: { hello: string, world: string } & Record<string, string>;

// after
interface NewType extends Record<string, string> {
    hello: string;
    world: string;
}

let x: NewType;