@get:Internal
    protected
    val subprojectsJson = project.layout.projectDirectory.file(".teamcity/subprojects.json")

    protected
    fun generateSubprojectsJson(): String {
        val subprojects = generateSubprojects()
        val gson = GsonBuilder().setPrettyPrinting().create()
        return gson.toJson(subprojects) + '\n'
    }

    private