Changes in version 1.0.0 (2025-03-18) o updated style file for markdown vignette o added citation for JSS article doi:10.18637/jss.v112.i04 Changes in version 0.9.3 (2023-09-22) o Fixed example for 'from_validator' in documentation. o Better checking of formula specification of collapsing scheme. o Improvements in documentation (thanks to the JSS editorial team for pointing them out). Changes in version 0.9.0 (2023-03-03) o Package now supports complex objects as aggregation output o Internal: complete code reorganization Changes in version 0.8.1 (2023-01-24) o Added URL to description o Fixed typo in DESCRIPTION (thanks to CRAN team) Changes in version 0.8.0 o First CRAN release attempt