Why using custom example generator instead of relying on protagonist output?

https://github.com/danielgtaylor/aglio/commit/c14f143d2bc1495ca418ff8b2938c2594fe21ad6 this commit is a source of such problem:

```
# Foo

# Data Structures

## Test (object)
+ One Of
+ Properties
+ A: x (enum, required)
+ B: x (required, string)
+ Properties
+ A: y (enum, required)
+ C: y (required, string)
+ Properties
+ A: z (enum, required)

# GET /foo
+ Response 200 (application/json)
+ Attributes (Test)

```

Such doc gives `{"A": "x"}` as an example instead of `{"A": "x", "B": "x"}`. Is it essential now to generate examples using aglio instead of using protagonist output?