groupId property
final
An optional group ID that groups TapRegions together so that they operate as one region. If any member of a group is hit by a particular tap, then the onTapOutside / onTapUpOutside will not be called for any members of the group. If any member of the group is hit, then all members will have their onTapInside / onTapUpInside called.
If the group id is null, then only this region is hit tested.
Implementation
final Object? groupId;