Install ruby-introspection by entering the following commands in the terminal:
sudo apt update sudo apt install ruby-introspection
Description:
Ruby library for the inspection of method definitions on objects
This library allows a dynamic inspection of the hierarchy of method definitions on a Ruby object. It can be used in particular to detect undesirable changes to classes made by other libraries.
Homepage: https://github.com/floehopper/introspection
Version: 0.0.3-1
Section: universe/ruby