text: __ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ___
  
  We have now stated that every Pizza hasCaloricContent and that content must be an integer. In 
  addition to using the predefined set of datatypes we can further specialize the use of a datatype by 
  specifying restrictions on the possible values. For example, it is easy to specify a range of values for a 
  number. 