* Handle changes to source entity in derivative helper * Rename helper function, improve docstring * Add tests * Improve derivative tests * Deduplicate tests * Rename helpers/helper_entity.py to helpers/helper_integration.py * Rename tests
* Handle changes to source entity in derivative helper * Rename helper function, improve docstring * Add tests * Improve derivative tests * Deduplicate tests * Rename helpers/helper_entity.py to helpers/helper_integration.py * Rename tests