private fun span(s: CharSequence, o: Any) = (if (s is String) SpannableString(s) else s as? SpannableString
        ?: SpannableString("")).apply { setSpan(o, 0, length, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE) }

operator fun SpannableString.plus(s: SpannableString) = SpannableString(TextUtils.concat(this, s))

fun color(color: Int, s: CharSequence) = span(s, ForegroundColorSpan(color))

"Top trending position: " + color(Color.RED, poll.topTrendingPosition.toString())