// foo.ts
import { Bar } from "./bar";

const bar: Bar = {};

// bar.ts
export type SomeType = { x: string };

export interface Bar {
  bar(): SomeType;
}

import { Bar } from "./bar";

const bar: Bar = {
  bar: function (): SomeType { // <-- Cannot find name 'SomeType'
    throw new Error("Function not implemented.");
  }
};

import { Bar, SomeType } from "./bar"; // <-- SomeType should be imported

const bar: Bar = {
  bar: function (): SomeType {
    throw new Error("Function not implemented.");
  }
};

import { Bar } from "./bar";

class BarClass implements Bar {};

import { Bar, SomeType } from "./bar"; // <-- correctly added

class BarClass implements Bar {
  bar(): SomeType {
    throw new Error("Method not implemented.");
  }
};