def load_prefix_file!
      @prefixes = {}
      File.open("#{File.dirname(__FILE__)}/../../mac-prefixes.txt", 'r').each_line do |line|
        line.strip!
        next if line.empty? || line.start_with?('#', '//')
        oui, organization = line.split(' ', 2)
        @prefixes[oui.to_sym] = organization
      end
    end
def load_prefix_file!
      @prefixes = {}
      File.open("#{File.dirname(__FILE__)}/../../mac-prefixes.txt", 'r').each_line do |line|
        line.strip!
        next if line.empty? || line.start_with?('#', '//')
        oui, organization = line.split(' ', 2)
        @prefixes[oui.to_sym] = organization
      end
    end
Internal: Load the file with prefixes

 Returns nothing