RegistryOptionGroup typedef
One group of related options: a paired set or a selected set.
required requires all paired members or at least one selected member.
single limits a selected group to at most one member and is false for a
paired group. In registry-produced records, a member's pairedOptions is
empty for a selected group and lists the partners for a paired group.
Implementation
typedef RegistryOptionGroup = ({
bool required,
bool single,
List<String> members,
});