private void copyLocation(CalendarEventModel eventModel, Map<String, Object> graphCalendar) {
    if (eventModel.getLocation() == null) {
      return;
    }
    Map<String, String> graphLocation = new HashMap<>();
    graphLocation.put("displayName", eventModel.getLocation());
    graphLocation.put("locationType", "Default");
    graphCalendar.put("location", graphLocation);
  }
Maps from a transfer event type to a Graph API event resource as defined by:
https://developer.microsoft.com/en-us/graph/docs/api-reference/v1.0/resources/event.
extensions/data-transfer/portability-data-transfer-microsoft/src/main/java/org/datatransferproject/transfer/microsoft/transformer/calendar/ToGraphEventTransformer.java