requireNullableFields

Whether nullable fields must be present in JSON.

Only applies when respectDefaultPresence is false.

When true: Nullable fields ARE in the required array (must be present, can be null). When false: Nullable fields are NOT in the required array (can be omitted).

Example with requireNullableFields = true (strict mode):

fun writeLog(level: String, exception: String? = null)

Generates:

{
  "required": ["level", "exception"],
  "properties": {
    "level": { "type": "string" },
    "exception": { "type": ["string", "null"] }
  }
}

Example with requireNullableFields = false:

{
  "required": ["level"],
  "properties": {
    "level": { "type": "string" },
    "exception": { "type": ["string", "null"] }
  }
}

Default: true (Draft 2020-12 strict mode)