如何将Java String转换为Enum ConverterFactory类转换为Kotlin

import retrofit2.Converter
import retrofit2.Retrofit
import java.lang.reflect.Type

class EnumConverterFactory : Converter.Factory() {
    override fun stringConverter(
        type: Type,
        annotations: Array<Annotation>,
        retrofit: Retrofit
    ): Converter<*, String>? {
        if (type is Class<*> && type.isEnum) {
            return Converter<Any, String> { value -> value.toString() }
        }
        return null
    }
}

val retrofit = Retrofit.Builder()
    .baseUrl(BASE_URL)
    .addConverterFactory(EnumConverterFactory())
    .build()

enum class Color {
    RED, GREEN, BLUE
}