# File lib/chef/provider/package/rubygems.rb, line 383
        def target_version_already_installed?
          return false unless @current_resource && @current_resource.version
          return false if @current_resource.version.nil?
          # in the future we could support squiggly requirements like "~> 1.2.0"
          # for now, the behavior when using anything other than exact 
          # requirements is undefined.
          Gem::Requirement.new(@new_resource.version).satisfied_by?(Gem::Version.new(@current_resource.version))
        end