/**
* Check if the given block exist. If not then an error is logged.
* Otherwise it hides the block even if it is not "empty".
*
* Is somewhat an opposite to touchBlock().
*
* @param string block name
* @return integer SIGMA_OK on success, SIGMA_BLOCK_NOT_FOUND on failure
*/
function hideBlock($block)
{
if (!$this->blockExists($block)) {
\DBG::log('The SIGMA-Block ' . $block . ' does not exist');
return SIGMA_BLOCK_NOT_FOUND;
}
return parent::hideBlock($block);
}