Is there a document for blueprint FString function?

I want to know what each blueprint fstring function does(for some reason there is no function description in each fstring function). Is there a guide for that?

the closest i could find is this

https://docs.unrealengine.com/latest/INT/Programming/UnrealArchitecture/StringHandling/FString/index.html#comparisons

but it’s a c++ function document.

thanks.