Get the data object
getData.RdRetrieves the data object by sending a call to the client, which then sends the data to an input with name paste0(proxy, "_data")
By retrieving the data object from the client, you can get the current data in the spreadsheet, including all formatting and other custom settings.
TO DO: add logic to: load the spreadsheet via the getData data object add logic to parse the data object into a list containing data.frames