/** Returns the oldest build in the record. */
@Exported
@QuickSilver
public RunT getFirstBuild() {
SortedMap<Integer, ? extends RunT> runs = _getRuns();
if (runs.isEmpty()) return null;
return runs.get(runs.lastKey());
}
/**
* Gets the youngest build #m that satisfies <tt>n<=m</tt>.
*
* <p>This is useful when you'd like to fetch a build but the exact build might be already gone
* (deleted, rotated, etc.)
*/
public final RunT getNearestBuild(int n) {
SortedMap<Integer, ? extends RunT> m = _getRuns().headMap(n - 1); // the map should
// include n, so n-1
if (m.isEmpty()) return null;
return m.get(m.lastKey());
}