# File lib/fog/bin/virtual_box.rb, line 26
    def available?
      availability = !Gem.source_index.find_name('virtualbox').empty?
      if availability
        for service in services
          for collection in self.class_for(service).collections
            unless self.respond_to?(collection)
              self.class_eval "def self.\#{collection}\nself[:\#{service}].\#{collection}\nend\n", __FILE__, __LINE__
            end
          end
        end
      end
      availability
    end