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