fun Project.selectStringProperties(vararg propertyNames: String): Map<String, String> =
    propertyNames.mapNotNull { propertyName ->
        stringPropertyOrNull(propertyName)?.let { propertyValue ->
            propertyName to propertyValue
        }
    }.toMap()


/**
 * Creates a [Provider] that returns `true` when this [Provider] has a value
 * and `false` otherwise. The returned [Provider] always has a value.

            // set at the configuration time. Everything that reads a mutated property value should be saved
            // as a fixed value.
            return
        }
        val propertyValue =
            if (isSystemPropertyLoaded(key)) {
                // Loaded values of the system properties are loaded from gradle.properties but never mutated.