How to use the @aws-crypto/material-management-node.KeyringTraceFlag.WRAPPING_KEY_GENERATED_DATA_KEY function in @aws-crypto/material-management-node

constructor (input: RawAesKeyringNodeInput) {
    super()

    const { keyName, keyNamespace, unencryptedMasterKey, wrappingSuite } = input
    /* Precondition: AesKeyringNode needs identifying information for encrypt and decrypt. */
    needs(keyName && keyNamespace, 'Identifying information must be defined.')
    /* Precondition: RawAesKeyringNode requires wrappingSuite to be a valid RawAesWrappingSuite. */
    const wrappingMaterial = new NodeRawAesMaterial(wrappingSuite)
      /* Precondition: unencryptedMasterKey must correspond to the NodeAlgorithmSuite specification.
       * Note: the KeyringTrace and flag are _only_ set because I am reusing an existing implementation.
       * See: raw_aes_material.ts in @aws-crypto/raw-keyring for details
       */
      .setUnencryptedDataKey(unencryptedMasterKey, { keyNamespace, keyName, flags: KeyringTraceFlag.WRAPPING_KEY_GENERATED_DATA_KEY })

    const _wrapKey = async (material: NodeEncryptionMaterial) => {
      /* The AAD section is uInt16BE(length) + AAD
       * see: https://docs.aws.amazon.com/encryption-sdk/latest/developer-guide/message-format.html#header-aad
       * However, the RAW Keyring wants _only_ the ADD.
       * So, I just slice off the length.
       */
      const { buffer, byteOffset, byteLength } = serializeEncryptionContext(material.encryptionContext).slice(2)
      const aad = Buffer.from(buffer, byteOffset, byteLength)
      const { keyNamespace, keyName } = this

      return aesGcmWrapKey(keyNamespace, keyName, material, aad, wrappingMaterial)
    }

    const _unwrapKey = async (material: NodeDecryptionMaterial, edk: EncryptedDataKey) => {
      const { keyNamespace, keyName } = this