Description:

Generates an example menu description yaml file at config/main_menu.yml
You can have multiple menu definitiions in an app. For this you can use
the '--type' parameter to set the name of the file

Examples:

rails generate partial_menu:yaml

This will create:
    config/main_menu.yaml

rails generate partial_menu:yaml -t side
rails generate partial_menu:yaml --type side

This will create:
    config/side_menu.yml