Data - object containing undo information for storage in a
command
#include <Unidraw/Command/data.h>
Data is an abstract base class for objects that components
store in commands they (un)interpret. Components use Data
subclasses to store whatever information they need to
uninterpret the command.
Data() The constructor is protected to prevent instantia-
tion.
Command(3U), Component(3U), Resource(3I)