// Keeps the last value
GTS = NEWGTS()
ADDVALUE(GTS, 100, NaN, NaN, NaN, 10)
ADDVALUE(GTS, 200, NaN, NaN, NaN, 9)
ADDVALUE(GTS, 300, NaN, NaN, NaN, 8)
ADDVALUE(GTS, 400, NaN, NaN, NaN, 7)
ADDVALUE(GTS, 500, NaN, NaN, NaN, 6)
ADDVALUE(GTS, 100, NaN, NaN, NaN, 10)
ADDVALUE(GTS, 200, NaN, NaN, NaN, 9)
return DEDUP(GTS)
// Sum the duplicate values (2.7.0+)
GTS = NEWGTS()
ADDVALUE(GTS, 100, NaN, NaN, NaN, 10)
ADDVALUE(GTS, 200, NaN, NaN, NaN, 9)
ADDVALUE(GTS, 300, NaN, NaN, NaN, 8)
ADDVALUE(GTS, 400, NaN, NaN, NaN, 7)
ADDVALUE(GTS, 500, NaN, NaN, NaN, 6)
ADDVALUE(GTS, 100, NaN, NaN, NaN, 10)
ADDVALUE(GTS, 200, NaN, NaN, NaN, 9)
return DEDUP(GTS, mapper.sum())