# File lib/prawn/font/afm.rb, line 23
      def self.metrics_path
        if m = ENV['METRICS']
          @metrics_path ||= m.split(':')
        else
          @metrics_path ||= [
            ".", "/usr/lib/afm",
            "/usr/local/lib/afm",
            "/usr/openwin/lib/fonts/afm/",
             Prawn::BASEDIR+'/data/fonts/']
        end
      end