# File lib/specinfra/command/windows/base/package.rb, line 3
    def check_is_installed(package, version=nil)
      version_selection = version.nil? ? "" : "-appVersion '#{version}'"
      Backend::PowerShell::Command.new do
        using 'find_installed_application.ps1'
        exec "(FindInstalledApplication -appName '#{package}' #{version_selection}) -eq $true"
      end
    end