A direct instance of wx:snip% is uninteresting. Useful snips are defined by instantiating derived subclasses, but this class defines the basic fucntionality.
In deriving a new snip class, these methods must be overridden to create a useful snip:
If a snip can contain more than one item, then the snip's count must be maintained as well.
To define a class of snips that can be saved or cut-and-pasted, the snip must have a snip class (an instance of wx:snip-class%) and the folowing methods must be overridden:
Creates a plain snip of length 1.