public class ImporterPrompter
Helper class for presenting the user with dialog boxes
for configuring importer options.
If running as a macro, gets parameter values from macro options;
if not, get parameter values from user input from dialog boxes.
Which dialogs are shown depends on a variety of factors, including the
current configuration (i.e., which options are enabled), whether quiet or
windowless mode is set, and whether the method is being called from within