Function Tcl_CreateObjTrace 

pub unsafe extern "C" fn Tcl_CreateObjTrace(
    interp: *mut Tcl_Interp,
    level: c_int,
    flags: c_int,
    objProc: Tcl_CmdObjTraceProc,
    clientData: ClientData,
    delProc: Tcl_CmdObjTraceDeleteProc,
) -> Tcl_Trace