question: public void extend ( final int size ) { Preconditions . checkArgument ( size > 0 , "The number of bytes to add must be positive" ) ; final byte [ ] data = new byte [ m_data . length + size ] ; System . arraycopy ( m_data , 0 , data , 0 , m_data . length ) ; m_data = data ; }
target:  Adds a number of 0-bytes at the end of the memory chunk.