public function compile(array $expression, CompilationContext $compilationContext)
    {
        $expr = new Expression($expression['right']);
        $expr->setReadOnly(true);
        $resolved = $expr->compile($compilationContext);

        if ('variable' != $resolved->getType()) {
            throw new CompilerException('Type-Hints only can be applied to dynamic variables.', $expression);
        }

        $symbolVariable = $compilationContext->symbolTable->getVariableForRead(
            $resolved->getCode(),
            $compilationContext,
            $expression
        );

        if (!$symbolVariable->isVariable()) {
            throw new CompilerException('Type-Hints only can be applied to dynamic variables.', $expression);
        }

        $symbolVariable->setDynamicTypes('object');
        $symbolVariable->setClassTypes($compilationContext->getFullName($expression['left']['value']));

        return $resolved;
    }