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.
You may begin to notice more pregnancy symptoms such as morning sickness. About 50% of pregnant women will experience morning sickness. Morning sickness normally begins around the 6th week of pregnancy, but it is not too soon to begin preparing for how you will deal with it. Morning sickness can be experienced in the morning, throughout the day, or in the evening.