question: public void writeBytes ( final byte [ ] bytes , final int off , final int len ) { if ( len > remaining ( ) ) { writeBytesSlow ( bytes , off , len ) ; return ; } final Block block = current ; System . arraycopy ( bytes , off , block . data , block . limit , len ) ; block . limit += len ; }
target:  Writes an array of bytes to the buffer expanding if necessary. 