Base page for the guided Decision Table Wizard
When the Widget is finished a GuidedDecisionTable52 instance is passed to
each page for enrichment. Some pages are able to work on this instance
directly (i.e. the model is suitable for direct use in the page, such as
FactPatternsPage) however others maintain their own representation of the
model that must be copied into the GuidedDecisionTable52.
Check whether empty values are permitted
- True if empty values are permitted