question: protected void restoreState ( ) { System . arraycopy ( storedIntervals , 0 , intervals , 0 , storedIntervals . length ) ; System . arraycopy ( storedLineageCounts , 0 , lineageCounts , 0 , storedLineageCounts . length ) ; intervalsKnown = storedIntervalsKnown ; intervalCount = storedIntervalCount ; likelihoodKnown = storedLikelihoodKnown ; logLikelihood = storedLogLikelihood ; if ( ! intervalsKnown ) { likelihoodKnown = false ; } }
target:  Restores the precalculated state: that is the intervals of the tree.