Are there trust funds in Germany?

Could you please elaborate on the existence of trust funds in Germany? I'm curious to know if such financial vehicles are commonly utilized in the country and, if so, what their primary purposes and features might be. Additionally, I'm interested in understanding the regulatory framework surrounding trust funds in Germany, including any specific laws or regulations that govern their operation. Would you be able to provide insights into the popularity and usage of trust funds among Germans, as well as any notable differences or similarities compared to other countries? Thank you for your assistance.