Fig sap to coagulate milk?

Fig sap to coagulate milk? I recently met someone who grew up in Greece. He recalls his mother adding the sap from fig leaves to milk, causing it to coagulate and make a yogurt-like drink. Curious to know more, I just came across this article that talks about fig sap used to make cheese:

Have you used fig sap in this way? If so, drop me a line: I’m interested to know more.