Create a new instance of a class with no indexed instance variables;
this method must not be overridden.
basicNew: numInstanceVariables
Create a new instance of a class with indexed instance variables. The
instance has numInstanceVariables indexed instance variables;
this method must not be overridden.
new
Create a new instance of a class with no indexed instance variables
new: numInstanceVariables
Create a new instance of a class with indexed instance variables. The
instance has numInstanceVariables indexed instance variables.