[BUG] Enum properties are always created in lowercase regardless of values in swagger

[AlexeyKatsuro]

I have similar issue with enum like #602

But I'm not able to change enum value to snake_case.

Is here a way to generate in the same case?

Library version used:
swagger_dart_code_generator: 2.15.0

Swagger specification link

      "AccessGroup": {
        "enum": [
          "NoOne",
          "ChannelAccess",
          "AreaAccess",
          "GroupAccess"
        ],
        "type": "string"
      },

It was generated as

enum AccessGroup {
  @JsonValue(null)
  swaggerGeneratedUnknown(null),

  @JsonValue('NoOne')
  noone('NoOne'),
  @JsonValue('ChannelAccess')
  channelaccess('ChannelAccess'),
  @JsonValue('AreaAccess')
  areaaccess('AreaAccess'),
  @JsonValue('GroupAccess')
  groupaccess('GroupAccess');

  final String? value;

  const AccessGroup(this.value);
}

Expected behavior

enum AccessGroup {
  @JsonValue(null)
  swaggerGeneratedUnknown(null),

  @JsonValue('NoOne')
  noOne('NoOne'),
  @JsonValue('ChannelAccess')
  channelAccess('ChannelAccess'),
  @JsonValue('AreaAccess')
  areaAccess('AreaAccess'),
  @JsonValue('GroupAccess')
  groupAccess('GroupAccess');

  final String? value;

  const AccessGroup(this.value);
}