# LibTmux::Workspace::ApplyResult#created_refs

**Workspace Manager concept example** A working example of the core library. It can change without notice.

- **Module:** LibTmux::Workspace
- **Package:** libtmux-workspace
- **Language:** Ruby
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-ruby/blob/d8ce4bbee0ca7748a81929f81f7d8d07f8c51267/gems/libtmux-workspace/lib/libtmux/workspace/apply.rb#L7
- **Page:** https://libtmux.org/en/ruby/v0.1.0.alpha.3/workspace/reference/libtmux-workspace-applyresult-created_refs/

```
def created_refs: () -> ::Hash[
  ::String,
  ::LibTmux::EntityRef
]
```

Returns the value of attribute created_refs.

Behavior contract: Workspace results.

## Examples

Apply a workspace whose panes cannot fit with compensate: true. The failed split is reported, the created session is removed, and the borrowed session stays. Use Ruby 4.0.7, Bundler, Git and tmux 3.3a or newer on Unix, with /bin/cat and /bin/sh available. In an empty directory, fetch the documented library revision:

```console
$ git clone https://github.com/libtmux/libtmux-ruby.git libtmux-source && \
  git -C libtmux-source checkout d8ce4bbee0ca7748a81929f81f7d8d07f8c51267
```

Save this dependency file as Gemfile:

```ruby
source "https://rubygems.org"

gem "libtmux-workspace", path: "libtmux-source/gems/libtmux-workspace"
```

Save this complete program as workspace_failure.rb. Its Server.start block owns a private tmux server and stops it on exit, including after an error.

[Source example](https://github.com/libtmux/libtmux-ruby/blob/d8ce4bbee0ca7748a81929f81f7d8d07f8c51267/examples/api/workspace_failure.rb).

```ruby
# frozen_string_literal: true

begin
  # docs:begin main
  require "json"
  require "libtmux"
  require "libtmux/workspace"

  LibTmux::Server.start do |server|
    server.new_session(name: "borrowed", command: ["/bin/cat"])
    crowded = LibTmux::Workspace.parse(
      JSON.generate({session_name: "crowded", windows: [{window_name: "small", panes: Array.new(40) { {} }}]}),
      format: :json, base_directory: __dir__
    )
    begin
      crowded.plan.apply(server: server, compensate: true)
    rescue LibTmux::Workspace::ApplyError => error
      puts "failed action: #{error.result.failed_action}"
      puts "created a session: #{error.result.created_refs.key?('session')}"
      puts "compensation: #{error.result.compensation}"
    end
    puts "sessions: #{server.list_sessions.map { |session| session.snapshot.name }.join(', ')}"
  end
  # docs:end main
rescue StandardError => error
  warn "#{error.class}: #{error.message}"
  exit 1
end
```

Install the runtime dependencies and run the saved program. An operation or cleanup error makes it exit unsuccessfully:

```console
$ bundle config set --local path vendor/bundle && \
  bundle install --jobs 2 && \
  bundle exec ruby workspace_failure.rb
```

Expected output:

```text
failed action: split_pane
created a session: true
compensation: completed
sessions: borrowed
```