uninitialized constant ProgressBar::WithProgress

[li-thy-um]

Hi, I want to use #with_progress but I can't

2.3.0 :001 > require 'progress_bar'
 => true
2.3.0 :002 > require 'progress_bar/with_progress'
LoadError: cannot load such file -- progress_bar/with_progress
    from /Users/lithium/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /Users/lithium/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from (irb):2
    from /Users/lithium/.rvm/rubies/ruby-2.3.0/bin/irb:11:in `<main>'
2.3.0 :003 > ProgressBar
 => ProgressBar
2.3.0 :004 > ProgressBar::WithProgress
NameError: uninitialized constant ProgressBar::WithProgress
    from (irb):4
    from /Users/lithium/.rvm/rubies/ruby-2.3.0/bin/irb:11:in `<main>'

I check my ~/.rvm/gems/ruby-2.3.0/gems/progress_bar-1.0.5/ find there is no relative ruby files

use bundle exec irb fixed the issue.