docs: @Operation(name="$everything", idempotent=true)
     public Bundle patientInstanceOperation(
        @IdParam IdDt thePatientId,
        @OperationParam(name="start") DateDt theStart,
        @OperationParam(name="end") DateDt theEnd) {
        
        Bundle retVal = new Bundle();
        // Populate bundle with matching resources
        return retVal;
     }