drupal generate:module
–module=’My checkout pane’
–machine-name=’my_checkout_pane’
–description=’My checkout pane’
–core=’8.x’
–package=’Custom’
–composer
–dependencies=’commerce:commerce_checkout’
drupal generate:plugin:skeleton
–module=’my_checkout_pane’
–plugin-id=’commerce_checkout_pane’
–class=’CustomCompletionMessage’