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ArgbEvaluator.kt

private fun setParentBackgroundColor(offset: Float, position: Int): Int {
        val bgColorList = listOf(
                ContextCompat.getColor(baseActivity, R.color.blue),
                ContextCompat.getColor(baseActivity, R.color.green)
        )

        return ArgbEvaluator().evaluate(
                offset,
                bgColorList[if (position > bgColorList.size - 1) 0 else position],
                bgColorList[when {
                    position > bgColorList.size - 1 -> 0
                    position == bgColorList.size - 1 -> 0
                    else -> position + 1
                }]
        ) as Int
    }