Add a default style for default use in fillCells (therefore, create setStyle and getStyle to access it)
Add openxlsx::createWorkbook to epiuf::openXlsx function with a new argument (e.g. create = TRUE/FALSE)
Add openxlsx::addWorksheet to epiuf::openSheet function with a new argument (e.g. create = TRUE/FALSE)
Add a default style for default use in fillCells (therefore, create setStyle and getStyle to access it) Add openxlsx::createWorkbook to epiuf::openXlsx function with a new argument (e.g. create = TRUE/FALSE) Add openxlsx::addWorksheet to epiuf::openSheet function with a new argument (e.g. create = TRUE/FALSE)