digraph {
    subgraph cluster_os_log {
        label="os/log";
        LogSWrite;
        LogMessage             -> LogVMessageVerb;
        LogMessageVerb         -> LogVMessageVerb;
        LogMessageVerbSigSafe  -> LogVMessageVerbSigSafe;
        LogVMessageVerb        -> LogVMessageVerbSigSafe;
        LogVMessageVerb        -> LogSWrite;
        LogVMessageVerbSigSafe -> LogSWrite;
        LogVHdrMessageVerb     -> vpnprintf;
        LogVHdrMessageVerb     -> pnprintf;
        LogVHdrMessageVerb     -> LogSWrite;
        LogHdrMessageVerb      -> LogVHdrMessageVerb;
        VAuditF                -> ErrorF;
        VAuditF                -> vsnprintf;
        AuditFlush             -> ErrorF;
        AuditF                 -> VAuditF;
        FatalError             -> ErrofFSigSafe;
        FatalError             -> VErrorFSigSafe;
        FatalError             -> OsVendorFatalError;
        FatalError             -> AbortServer;
        FatalError             -> OsAbort;
        VErrorF                -> OsVendorVErrorFProc;
        VErrorF                -> LogVMessageVerb;
        ErrorF                 -> VErrorF;
        VErrorFSigSafe         -> LogVMessageVerbSigSafe;
        ErrorFSigSafe          -> VErrorFSigSafe;
        LogPrintMarkers        -> LogMessageVerb;
    }
    subgraph cluster_xwin {
        label="XWin";
        xwin__OsVendorVErrorF -> LogVMessageVerb;
        winDrvMsg             -> LogVMessageVerb;
        winDrvMsgVerb         -> LogVMessageVerb;
        winErrorFVerb         -> LogVMessageVerb;
        winDebug              -> LogVMessageVerb;
        winTrace              -> LogVMessageVerb;
    }
    subgraph cluster_xf86 {
        label="xf86";
        xf86VDrvMsgVerb   -> LogVMessageVerb;
        xf86DrvMsgVerb    -> xf86VDrvMsgVerb;
        xf86IDrvMsg       -> xf86VIDrvMsgVerb;
        xf86DrvMsg        -> xf86VDrvMsgVerb;
        xf86VIDrvMsgVerb  -> LogHdrMessageVerb;
        xf86ErrorFVerb    -> LogVMessageVerb;
        xf86ErrorF        -> LogVMessageVerb;
        xf86LogInit       -> xf86SetVerbosity;
        xf86LogInit       -> xf86SetLogVerbosity;
        xf86PrintChipsets -> LogMessageVerb;
    }
}