Expected Behavior

getCellRefs (data.frame(6,8))
would show Excel-style alphanumeric cell reference

Actual Behavior

Cannot find function "getCellRefs"

Steps to Reproduce the Problem

getCellRefs (data.frame(6,8))

sessionInfo()

R version 3.6.1 (2019-07-05)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 18362)

Matrix products: default

Random number generation:
RNG: Mersenne-Twister
Normal: Inversion
Sample: Rounding

locale:
[1] LC_COLLATE=German_Germany.1252 LC_CTYPE=German_Germany.1252 LC_MONETARY=German_Germany.1252
[4] LC_NUMERIC=C LC_TIME=German_Germany.1252

attached base packages:
[1] stats graphics grDevices utils datasets methods base

other attached packages:
[1] dplyr_0.8.3 openxlsx_4.1.2 data.table_1.12.6 dbplyr_1.4.2 RMySQL_0.10.17
[6] DBI_1.0.0

loaded via a namespace (and not attached):
[1] Rcpp_1.0.2 crayon_1.3.4 assertthat_0.2.1 R6_2.4.0 magrittr_1.5 zip_2.0.4
[7] pillar_1.4.2 rlang_0.4.1 fortunes_1.5-4 tools_3.6.1 glue_1.3.1 purrr_0.3.3
[13] compiler_3.6.1 pkgconfig_2.0.3 tidyselect_0.2.5 tibble_2.1.3

• Version of openxlsx: 4.1.2
• Version of R: 3.6.1