/usr/lib/ruby/vendor_ruby/introspection.rb is in ruby-introspection 0.0.3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 | require "introspection/core_ext"
require "introspection/receivers"
require "introspection/method"
require "introspection/snapshot"
require "introspection/assertions"
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