TclStubs.tcl_TraceVar

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
struct TclStubs
extern (C)
int function(Tcl_Interp* interp, const(char)* varName, int flags, Tcl_VarTraceProc proc, ClientData clientData) nothrow tcl_TraceVar;

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