public function getMappedSecondAttributes()
    {
        $attributes = [];

        /* Only the first array in data will be examined, and map its attributes to db attributes,
           the attributes that are not present, will not be included
        */
        if (is_array($this->data[0])) {
            foreach ($this->data[0] as $attribute => $attributeValue) {
                if (array_key_exists($attribute, $this->mappingFirstEntityToSecondEntityAttributes)) {
                    $attributes[$this->mappingFirstEntityToSecondEntityAttributes[$attribute]] = $attributeValue;
                }
            }
        }

        return $attributes;
    }