How to use the @aws-crypto/client-node.excludeRegions function in @aws-crypto/client-node

export async function kmsRegionalDiscoveryExcludeTest (ciphertext: string|Buffer) {
  const discovery = true
  // This provider will decrypt for keys in any region except us-east-1.
  const clientProvider = excludeRegions(['us-east-1'], getKmsClient)
  const keyring = new KmsKeyringNode({ clientProvider, discovery })

  const cleartext = await decrypt(keyring, ciphertext)

  return { ciphertext, cleartext }
}