operator > method
Implementation
bool operator >(Object o) => valueNumber == null ||
(o is! FhirNumber && o is! num) ||
(o is FhirNumber && o.valueNumber == null)
? throw InvalidTypes<FhirNumber>(
'One of the values is not valid or null\n'
'This number is: ${toString()}, compared number is $o')
: o is FhirNumber
? valueNumber! > o.valueNumber!
: valueNumber! > (o as num);