You agree that you are the sole author of this work and that you are not aware of any patents that are infringed by your contribution.
You are providing this contribution under the following license:
Permission is hereby granted, free of charge, to Sam Halliday to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so.
This is necessary for your contribution to be included in distributions of drone-dynamic-agents (GPLv3), and used in the book Functional Programming for Mortals (permissive Apache 2.0).