NS_NOTYETIMPLEMENTED("write me!"); return NS_ERROR_NOT_IMPLEMENTED;
return NS_OK;
InMemoryDataSource::DoCommand(nsISupportsArray/*<nsIRDFResource>*/* aSources,                              nsIRDFResource*   aCommand,                              nsISupportsArray/*<nsIRDFResource>*/* aArguments){    NS_NOTYETIMPLEMENTED("write me!");    return NS_ERROR_NOT_IMPLEMENTED;}