🐍 Snake_case parsing issue in list field names when generating data classes

[yelmuratoff]

If snake_case is selected as the naming convention, the generated list fields do not properly follow the conversion rule.

Expected behavior:

The generated code should respect the snake_case convention and produce:

subGroupStories: List<StorySubGroupItemDTO>.from(
    cast<Iterable>('sub_group_stories').map((x) => StorySubGroupItemDTO.fromMap(Map.from(x as Map)))),

Actual behavior:

Instead, the field name remains in camelCase:

subGroupStories: List<StorySubGroupItemDTO>.from(
    cast<Iterable>('subGroupStories').map((x) => StorySubGroupItemDTO.fromMap(Map.from(x as Map)))),