meaning of @ in class context?

In some Mathworks code, I see lines such as

obj = obj@icinterface('serial');

I do not recognize the use of "@" in that context, and I do not find it mentioned when I browse through the class documentation. Could someone point me to the documentation of its meaning?

Answer 1

[per isakson]

See Call Superclass Methods on Subclass Objects

[Walter Roberson]

Thanks, per, that looks like it.