Changes in version 0.1.2 (2023-09-16)                  

  - Address compatibility issue with Matrix 1.6-2 release

                 Changes in version 0.1.1 (2020-12-04)                  

  - Fix behavior when pairs are represented using different types
  - Improve documentation by adding examples
  - First release to CRAN

                        Changes in version 0.1.0                        

  - Initial release