HumanHandPoseObservation.JointsGroupName.thumb A joint name that represents the thumb. Declarationcase thumb See AlsoGetting the group nameHumanHandPoseObservation.JointsGroupName.indexFingerHumanHandPoseObservation.JointsGroupName.littleFingerHumanHandPoseObservation.JointsGroupName.middleFingerHumanHandPoseObservation.JointsGroupName.ringFinger