question: private void caseFoldLower ( char word [ ] , int length ) { lowerBuffer = ArrayUtil . grow ( lowerBuffer , length ) ; System . arraycopy ( word , 0 , lowerBuffer , 0 , length ) ; lowerBuffer [ 0 ] = dictionary . caseFold ( lowerBuffer [ 0 ] ) ; }
target:  folds lowercase variant of word (title cased) to lowerBuffer 