private val valueSourceProviderFactory: ValueSourceProviderFactory
) : Codec<ValueSourceProvider<*, *>> {

    override suspend fun WriteContext.encode(value: ValueSourceProvider<*, *>) {
        if (!value.hasBeenObtained()) {
            // source has **NOT** been used as build logic input:
            // serialize the source
            writeBoolean(true)
            encodeValueSource(value)
        } else {