Just a wrapper of wb$copy()
copyWorkbook(wb)
Workbook
wb <- createWorkbook()
wb2 <- wb ## does not create a copy
wb3 <- copyWorkbook(wb) ## wrapper for wb$copy()
addWorksheet(wb, "Sheet1") ## adds worksheet to both wb and wb2 but not wb3
names(wb)
#> [1] "Sheet1"
names(wb2)
#> [1] "Sheet1"
names(wb3)
#> character(0)