subject property
subject The patient, or group of patients, location, device,
organization, procedure or practitioner this observation is about and
into whose or what record the observation is placed. If the actual
focus of the observation is different from the subject (or a sample
of, part, or region of the subject), the focus
element or the code
itself specifies the actual focus of the observation.
Implementation
Reference? get subject => throw _privateConstructorUsedError;