module Asciidoctor::SyntaxHighlighter::RougeAdapter::Loader

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

def load_library
  (defined? RougeExt) ? :loaded : (Helpers.require_library %(#{::File.dirname __dir__}/rouge_ext), 'rouge', :warn).nil? ? :unavailable : :loaded
end