# File lib/pry/helpers/base_helpers.rb, line 25
      def gem_installed?(gem_name)
        require 'rubygems'
        Gem::Specification.respond_to?(:find_all_by_name) ? !Gem::Specification.find_all_by_name(gem_name).empty? : Gem.source_index.find_name(gem_name).first
      end