basis property
basis
The population basis specifies the type of elements in the
population. For a subject-based measure, this is boolean (because the
subject and the population basis are the same, and the population
criteria define yes/no values for each individual in the population).
For measures that have a population basis that is different than the
subject, this element specifies the type of the population basis. For
example, an encounter-based measure has a subject of Patient and a
population basis of Encounter, and the population criteria all return
lists of Encounters.
Implementation
FhirCode? get basis => throw _privateConstructorUsedError;