protected function _getInputHTMLKey($altKey = '')
    {
        if ($this->_block->getRepeaterId() && $this->_block->getRepeaterRowId()) {
            $inputHTMLKey = 'repeater[' . $this->_block->getRepeaterId() . '][' . $this->_block->getRepeaterRowId() . ']';
        } else {
            $inputHTMLKey = 'block';
        }
        return $inputHTMLKey . '[' . $this->_block->id . ']' . ($altKey ? '[' . $altKey . ']' : '');
    }