public ByteStringBuilder appendBytes(final byte[] bytes,final int offset,final int length){
  ByteString.checkArrayBounds(bytes,offset,length);
  if (length != 0) {
    ensureAdditionalCapacity(length);
    System.arraycopy(bytes,offset,buffer,this.length,length);
    this.length+=length;
  }
  return this;
}

public ByteStringBuilder appendBytes ( final byte [ ] bytes , final int offset , final int length ) { ByteString . checkArrayBounds ( bytes , offset , length ) ; if ( length != 0 ) { ensureAdditionalCapacity ( length ) ; System . arraycopy ( bytes , offset , buffer , this . length , length ) ; this . length += length ; } return this ; }
appends the provided byte array to this byte string builder .
