Cask: Use nested classes and modules.

Library/Homebrew/cask/.rubocop.yml

Library/Homebrew/cask/lib/hbc.rb

Library/Homebrew/cask/lib/hbc/artifact.rb

...y/Homebrew/cask/lib/hbc/artifact/abstract_flight_block.rb

Library/Homebrew/cask/lib/hbc/artifact/app.rb

Library/Homebrew/cask/lib/hbc/artifact/artifact.rb

Library/Homebrew/cask/lib/hbc/artifact/audio_unit_plugin.rb

Library/Homebrew/cask/lib/hbc/artifact/base.rb

Library/Homebrew/cask/lib/hbc/artifact/binary.rb

Library/Homebrew/cask/lib/hbc/artifact/colorpicker.rb

Library/Homebrew/cask/lib/hbc/artifact/font.rb

Library/Homebrew/cask/lib/hbc/artifact/input_method.rb

Library/Homebrew/cask/lib/hbc/artifact/installer.rb

Library/Homebrew/cask/lib/hbc/artifact/internet_plugin.rb

Library/Homebrew/cask/lib/hbc/artifact/moved.rb

Library/Homebrew/cask/lib/hbc/artifact/nested_container.rb

Library/Homebrew/cask/lib/hbc/artifact/pkg.rb

Library/Homebrew/cask/lib/hbc/artifact/postflight_block.rb

Library/Homebrew/cask/lib/hbc/artifact/preflight_block.rb

Library/Homebrew/cask/lib/hbc/artifact/prefpane.rb