Function readOnlyArrayHasStringMember

src/utils/util.ts:273–276

(
  readOnlyArray: ReadonlyArray<T>,
  maybeMember: T | string,
)

 * @returns whether the array contains the member or not
 */
export const readOnlyArrayHasStringMember = <T extends string>(
  readOnlyArray: ReadonlyArray<T>,
  maybeMember: T | string,
): maybeMember is T => readOnlyArray.includes(maybeMember as (typeof readOnlyArray)[number]);