/guava/guava/src/com/google/common/hash/MacHashFunction.java
checkNotNull( bytes) ;checkNotDone( ) ;
checkNotDone ( ) ;
protected void update(byte[] b) { checkNotDone(); mac.update(b); } @Override protected void update(byte[] b, int off, int len) { <extra_id_0> mac.update(b, off, len); } @Override protected void update(ByteBuffer bytes) { checkNotDone(); checkNotNull(bytes);