Api\StructType\ApiItem::setDisplayName PHP Method

    public function setDisplayName($displayName = null)
    {
        // validation for constraint: string
        if (!is_null($displayName) && !is_string($displayName)) {
            throw new \InvalidArgumentException(sprintf('Invalid value, please provide a string, "%s" given', gettype($displayName)), __LINE__);
        }
        $this->displayName = $displayName;
        return $this;
    }