Returns true if aClass is the receiver or a superclass of the receiver.
inheritsFrom: aClass
Returns true if aClass is a superclass of the receiver
kindOfSubclass
Return a string indicating the type of class the receiver is
shape
Answer the symbolic shape of my instances.
#ushort
shape: shape
Give the provided shape to the receiver's instances.
The shape can be nil, or one of #byte #int8 #character #short #word
#ushort #int #uint #int64 #uint64 #utf32 #float #double or #pointer.
In addition, the special value #inherit means to use the shape of the
superclass; note however that this is a static setting, and subclasses
that used #inherit are not mutated when the superclass adopts a different
shape.