@get:Optional
        val buildReceiptFileContents: Property<String>
    }

    override fun obtain(): String? = parameters.run {
        buildReceiptString()
            ?.let(BuildReceipt::readBuildReceiptFromString)
            ?.let { buildReceipt ->
                buildReceipt["buildTimestamp"] as String
            }
    }

    override fun getDisplayName(): String =

        private
        fun newSimpleDateFormatUTC(pattern: String) = SimpleDateFormat(pattern).apply {
            timeZone = TimeZone.getTimeZone("UTC")
        }

        fun readBuildReceiptFromString(buildReceipt: String) =
            Properties().apply { load(buildReceipt.reader()) }

        const val buildReceiptFileName = "build-receipt.properties"