expectedIDs.add (NULL_ASSET_ID);
  protected void addExpectedProviders() {    try {      boolean needsAir = !getMyParams().hasParam ("doesNotNeedAirTransportProvider");      String GLOBAL_AIR_ID = (getMyParams().hasParam ("GlobalAirRole")) ?	getMyParams().getStringParam("GlobalAirRole") :	"AirTransportationProvider";      String GLOBAL_SEA_ID = (getMyParams().hasParam ("GlobalSeaRole")) ?	getMyParams().getStringParam("GlobalSeaRole") :	"SeaTransportationProvider";      String NULL_ASSET_ID = (getMyParams().hasParam ("NullAssetRole")) ?	getMyParams().getStringParam("NullAssetRole") :	"NullNomen";            if (needsAir) 	expectedIDs.add (GLOBAL_AIR_ID);      expectedIDs.add (GLOBAL_SEA_ID);      expectedIDs.add (NULL_ASSET_ID);    } catch(Exception e) {      error ("got really unexpected exception " + e);    }   }