@Serializable
    class TestObj {
        @SerialName("enumListProp")
        var listEnumProp: List<@Serializable(with = TestEnumSerializers.NotNullable::class) TestEnum>? = null
    }

    enum class TestEnum(val value: Int) {
        RED(0),
        GREEN(1),
        BLUE(2);
    }

    object TestEnumSerializers {
        var map = TestEnum.values().associateBy(TestEnum::value)
        object Nullable : KSerializer<TestEnum?> {
            override val descriptor: SerialDescriptor
                get() = StringDescriptor

            override fun deserialize(decoder: Decoder): TestEnum? {
                return try {
                    val value = decoder.decodeInt()
                    map[value]
                } catch (exception: NumberFormatException) {
                    null
                }
            }

            override fun serialize(encoder: Encoder, obj: TestEnum?) {
                obj?.value?.let { encoder.encodeInt(it) }
            }
        }

        object NotNullable : KSerializer<TestEnum> {
            override val descriptor: SerialDescriptor
                get() = StringDescriptor

            override fun deserialize(decoder: Decoder): TestEnum {
                return map.getValue(decoder.decodeInt())
            }

            override fun serialize(encoder: Encoder, obj: TestEnum) {
                obj.value.let { encoder.encodeInt(it) }
            }
        }
    }