Add a new method to Unmarshaller, DecodeWithErrorReporter, that supports parsing from an io.Reader
Add a new method to Unmarshaller, DecodeWithErrorReporter, that supports parsing from an io.Reader

PiperOrigin-RevId: 452766121

google/fhir,google/fhir,google/fhir,google/fhir,google/fhir,google/fhir