In instantiating the ImmutableString, the function pointers to the get and length methods actually refer to the String.get and String.length method, by going through the base variable which is an internally stored String object. The use of a function pointer can achieve inheritance of a method from a superclass.
Most women will start to show at some point between weeks 12 and 24 of pregnancy, with most reporting that they began to show during the first half of their second trimester, between 12 and 18 weeks.
I started to show around 3 1/2 months. With my second I started around 4 or 5, and with my last one it was almost 6 months when I started to show. I got a bloated bump at 9 weeks. I get an actually baby bump around 18 weeks. now at 21 weeks, people can sometimes tell I'm pregnant. really depends on your body weight, height, stomach muscles and whether you've had a child before.