@Override
public String closeBlock() throws ParseException {
if (blocks.isEmpty())
throw new ParseException(cb.getTemplateClass(), currentLine(), "No open block found");
IBlockHandler bh = blocks.pop();
return null == bh ? "" : bh.closeBlock();
}
@Override
public void openBlock(IBlockHandler bh) {
bh.openBlock();
blocks.push(bh);
}