+ * Get the shortest recorded duration and the time when it was recorded.
+ *
+ * @return Duration and timestamp.
+ */
+ abstract DurationWithTime getShortest();
+
+ /**
+ * Get the longest recorded duration and the time when it was recorded.
+ *
+ * @return Duration and timestamp.
+ */
+ abstract DurationWithTime getLongest();
+
+ /**
+ * Returns formatted value of number, e.g. "12.34". Always is used dot as decimal separator.