refactor: lambda-callbacks instead of fill columns #482
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resolves #
Summary
instead of the columns pulling the next row from the file_reader, the file_reader
instead pushes the value to the columns using callbacks.
This is in preparation for parallelizing the building of column functions
PR Checklist
- [ ] All necessary documentation has been adapted or there is an issue to do so.- [ ] The implemented feature is covered by an appropriate test.