public function contains($propertyName, $operand)
{
if (!$this->classSchema->isMultiValuedProperty($propertyName)) {
throw new InvalidQueryException('Property "' . $propertyName . '" must be multi-valued', 1276781026);
}
return $this->qomFactory->comparison($this->qomFactory->propertyValue($propertyName, '_entity'), QueryInterface::OPERATOR_CONTAINS, $operand);
}