@Override
  public Importer<?, ?> getImporter(DataVertical transferDataType) {
    Preconditions.checkState(initialized);
    Preconditions.checkArgument(SUPPORTED_IMPORT_SERVICES.contains(transferDataType));
    return importerMap.get(transferDataType);
  }
Bootstraps the Microsoft data transfer services.
extensions/data-transfer/portability-data-transfer-microsoft/src/main/java/org/datatransferproject/transfer/microsoft/MicrosoftTransferExtension.java