This work is based on

https://github.com/ralfstuckert/pdfbox-layout

(MIT License)

as of October, 2020

and extended by "easytable"

https://github.com/vandeseer/easytable

(MIT License)

as of March, 2021

and extended by "boxable"

https://github.com/dhorions/boxable

(Apache 2.0 License)

as of March, 2021