diff --git a/dhis/src/main/java/org/dhis2/fhir/adapter/dhis/model/ImmutableOptionSet.java b/dhis/src/main/java/org/dhis2/fhir/adapter/dhis/model/ImmutableOptionSet.java index f88fb968..b229d988 100644 --- a/dhis/src/main/java/org/dhis2/fhir/adapter/dhis/model/ImmutableOptionSet.java +++ b/dhis/src/main/java/org/dhis2/fhir/adapter/dhis/model/ImmutableOptionSet.java @@ -1,7 +1,7 @@ package org.dhis2.fhir.adapter.dhis.model; /* - * Copyright (c) 2004-2018, University of Oslo + * Copyright (c) 2004-2019, University of Oslo * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -33,8 +33,10 @@ import com.fasterxml.jackson.annotation.JsonProperty; import javax.annotation.Nonnull; +import javax.annotation.Nullable; import java.io.Serializable; import java.util.List; +import java.util.Optional; import java.util.stream.Collectors; /** @@ -77,4 +79,12 @@ public List