The logic in the files in the 'blueprinters' folder is now _only_ the data transformation logic. Instead of taking in arguments like the sheetId, the tabName, and the sheetName, the function now takes a single argument: the list of lists that represents the raw data from the sheet.
This setup gives datasheet-server greater value, as it allows developers to only specify the transformation logic, and not worry about the other stuff that datasheet server is doing.