NS_IMETHOD                      GetIsOpen(PRBool* outOpen) { *outOpen = (mFileDesc != nsnull); return NS_OK; }
NS_IMETHODIMP FileImpl::GetIsOpen(PRBool* outOpen)  { *outOpen = (mFileDesc != nsnull); return NS_OK; }
        NS_IMETHOD                      GetIsOpen(PRBool* outOpen)                                        {                                            *outOpen = (mFileDesc != nsnull);                                            return NS_OK;                                        }