datatypes_are_defined & data_in_columns booleans
datatypes_are_defined & data_in_columns booleans

datatypes_are_defined is true once pre_analysis() is complete and column types are defined
data_in_columns is true once create_columns() is complete
These booleans are used to check if types are available to be exported into a template and if the data has been placed into columns, as gen_file() expects respectively.
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