classes:
- second
parameters:
_param:
notfound: exist
myparam: ${_param:some}
will:
not:
fail:
at:
tree: ${_param:notfound}
1:
an_numeric_key: true
as_a_dict: 1
2:
- as_a_list
3: value
three: ${two}
empty:
list:
dict:
~list_to_override: ${empty:list}
~dict_to_override: ${empty:dict}