# File lib/pry/helpers/base_helpers.rb, line 50
      def stub_proc(name, options)
        gems_needed = Array(options[:requires_gem])
        gems_not_installed = gems_needed.select { |g| !gem_installed?(g) }
        proc do
          output.puts "\nThe command '#{name}' requires the following gems to be installed: #{(gems_needed.join(", "))}"
          output.puts "-"
          output.puts "Command not available due to dependency on gems: `#{gems_not_installed.join(", ")}` not being met."
          output.puts "-"
          output.puts "Type `install #{name}` to install the required gems and activate this command."
        end
      end