tml?is-external=true#naturalOrder--" title="class or interface in java.util">naturalOrder</a>, <a href="http://d.android.com/reference/java/util/Comparator.html?is-external=true#nullsFirst-java.util.Comparator-" title="class or interface in java.util">nullsFirst</a>, <a href="http://d.android.com/reference/java/util/Comparator.html?is-external=true#nullsLast-java.util.Comparator-" title="class or interface in java.util">nullsLast</a>, <a href="http://d.android.com/reference/java/util/Comparator.html?is-exte