# File lib/pry/command.rb, line 358
    def call_safely(*args)
      unless dependencies_met?
        gems_needed = Array(command_options[:requires_gem])
        gems_not_installed = gems_needed.select { |g| !gem_installed?(g) }
        output.puts "\nThe command '#{command_name}' is #{Helpers::Text.bold("unavailable")} because it requires the following gems to be installed: #{(gems_not_installed.join(", "))}"
        output.puts "-"
        output.puts "Type `install-command #{command_name}` to install the required gems and activate this command."
        return void
      end

      if command_options[:argument_required] && args.empty?
        raise CommandError, "The command '#{command_name}' requires an argument."
      end

      ret = call_with_hooks(*args)
      command_options[:keep_retval] ? ret : void
    end