add symbol for setrev

Author: ben-schwen

inst/tests/tests.Rraw

@@ -60,6 +60,7 @@ if (exists("test.data.table", .GlobalEnv, inherits=FALSE)) {
   setcoalesce = data.table:::setcoalesce
   setdiff_ = data.table:::setdiff_
   setreordervec = data.table:::setreordervec
+  setrev = data.table:::setrev
   shallow = data.table:::shallow # until exported
   .shallow = data.table:::.shallow
   split.data.table = data.table:::split.data.table