/**
@class wxVariant
- @wxheader{variant.h}
The wxVariant class represents a container for any type. A variant's value
can be changed at run time, possibly to a different type of value.
/**
@class wxVariantData
- @wxheader{variant.h}
The wxVariantData class is used to implement a new type for wxVariant.
Derive from wxVariantData, and override the pure virtual functions.