assert_never.ts

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 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
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// Can be used in switch statements to ensure we perform exhaustive checks, see
// https://www.typescriptlang.org/docs/handbook/advanced-types.html#exhaustiveness-checking
export function assertNever(x: never): never {
  throw new Error(`Unexpected object: ${x}`);
}