module Asciidoctor::SyntaxHighlighter::CodeRayAdapter::Loader

def library_available?
  (@@library_status ||= load_library) == :loaded ? true : nil
end

def load_library
  (defined? ::CodeRay::Duo) ? :loaded : (Helpers.require_library 'coderay', true, :warn).nil? ? :unavailable : :loaded
end