kotlin.comparisons.compareBy

fun <T> compareBy(
    vararg selectors: (T) -> Comparable<*>?
): Comparator<T>

Creates a comparator using the sequence of functions to calculate a result of comparison. The functions are called sequentially, receive the given values a and b and return Comparable objects. As soon as the Comparable instances returned by a function for a and b values do not compare as equal, the result of that comparison is returned