# File lib/specinfra/command/poky/base/package.rb, line 3
    def check_is_installed(package, version=nil)
      package_escaped = escape(package)
      cmd = "opkg status #{package_escaped} | grep -E '^Version|(user|ok) installed$'"
      cmd = "#{cmd} | grep -E #{escape(version)}" if version
      cmd
    end