question: public UnescapedCharSequence ( char [ ] chars , boolean [ ] wasEscaped , int offset , int length ) { this . chars = new char [ length ] ; this . wasEscaped = new boolean [ length ] ; System . arraycopy ( chars , offset , this . chars , 0 , length ) ; System . arraycopy ( wasEscaped , offset , this . wasEscaped , 0 , length ) ; }
target:  Create a escaped CharSequence