Install cl-contextl by entering the following commands in the terminal:
sudo apt update sudo apt install cl-contextl
context orientation for Common Lisp
ContextL provides the Common Lisp Object System with functionality for context orientation. It allows the definition of context-specific methods or class slots, so that methods act differently depending on the dynamic context they are executed in. . It further allows developers to rebind places (e.g. slots of objects) dynamically using the "dletf" framework that has previously been present in AspectL.