private function parseParenthesisExpression()
{
$this->tokenStack->push();
$this->consumeComments();
$expr = $this->builder->buildAstExpression();
$expr = $this->parseBraceExpression($expr, $this->consumeToken(Tokens::T_PARENTHESIS_OPEN), Tokens::T_PARENTHESIS_CLOSE);
return $this->setNodePositionsAndReturn($expr);
}