Function has

packages/effect/src/Filter.ts:327–328

(key: K)

 */
export const has =
  <K>(key: K) => <Input extends { readonly has: (key: K) => boolean }>(input: Input): Result.Result<Input, Input> =>
    input.has(key) ? Result.succeed(input) : Result.fail(input)

/**
 * Creates a filter that only passes instances of the given constructor.