Example with mandatory variables not filled in

```yaml --- variable: example # A variable family: # A family variable1: example # A first variable subfamily: # A sub family variable: example # A variable variable2: example # A second variable ```

Example with all variables modifiable

```yaml --- variable: example # A variable family: # A family variable1: example # A first variable subfamily: # A sub family variable: example # A variable variable2: example # A second variable ```