Git

You can anonymously read the source code, study it's features and documentation by going to the GitHub repository directoy:

https://github.com/ezpublishlegacyprojects/payment

You can anonymously check out the source code released by this project from its Git repository:

git clone https://github.com/ezpublishlegacyprojects/payment.git

You may be able to anonymously check out the source code released by this project from its expected composer package:

composer require ezpublishlegacyprojects/payment

To be able to commit changes to the project's repository, you need to be a member of the project.