final class DerivedUnionType extends AbstractDerivedType<UnionTypeDefinition> implements UnionTypeDefinition {
DerivedUnionType(final UnionTypeDefinition baseType, final SchemaPath path, final Object defaultValue,
final String description, final String reference, final Status status, final String units,
- final Collection<UnknownSchemaNode> unknownSchemaNodes) {
+ final Collection<? extends UnknownSchemaNode> unknownSchemaNodes) {
super(baseType, path, defaultValue, description, reference, status, units, unknownSchemaNodes);
}