/**
* Get sub-Registry
*
* @param string $key Name of index or name-encoded registry array selection, e.g. a.b.c
* @return SessionStateInterface|boolean Sub-Registry or boolean FALSE if not existing or not a set of inputs
*/
public function subTree($key)
{
$input = $this->input->subTree($key);
$session = $this->session->subTree($this->sessionKeyPrefix . $key);
/** @var self $subSessionState */
$subSessionState = new static($session, $input);
$subSessionState->stateIsForDomain(null);
return $subSessionState;
}
