DonutProgress.kt

val model = DonutModel(
    cap = 8f,
    masterProgress = 1f,
    sections = listOf(
        DonutSection(amount = 1f, color = Color.Cyan),
        DonutSection(amount = 1f, color = Color.Red),
        DonutSection(amount = 1f, color = Color.Green),
        DonutSection(amount = 0f, color = Color.Blue)
    )
)

DonutProgress(model = model)

This is the first I see a Kotline file , If i am correct :
https://stackoverflow.com/questions/17508114/file-extension-kt-what-kind-of-file-is-this