Example with mandatory variables not filled in


---                                                                             
extra:                        # Extra                                           
  dyn_a:                      # dyn_{{ identifier }}                            
    var: example                                                                



Example with all variables modifiable


---                                                                             
rougail:                      # Rougail                                         
  var:                        # A variable                                      
    - a                                                                         
extra:                        # Extra                                           
  dyn_a:                      # dyn_{{ identifier }}                            
    var: example