# File lib/less/engine/nodes/property.rb, line 75
      def to_css env = nil
#        puts "property.to_css `#{to_s}` env:#{env ? env.variables : "nil"}"
        val = evaluate(env)
        "#{self}: #{if val.respond_to? :to_css
            val.to_css
          else
#            p val
#            puts "#{val.class} #{val.first.class}"
            val.map {|i| i.to_css }.join(", ")
          end};"
      end