src/RuleSet.php
private function getSetDefinition($name)
    {
        if (!isset($this->setDefinitions[$name])) {
            throw new \InvalidArgumentException(sprintf('Set "%s" does not exist.', $name));
        }

        return $this->setDefinitions[$name];
    }
private function getSetDefinition($name)
    {
        if (!isset($this->setDefinitions[$name])) {
            throw new \InvalidArgumentException(sprintf('Set "%s" does not exist.', $name));
        }

        return $this->setDefinitions[$name];
    }
@param string $name name of set

@return array