* @param input input value of fields parameter
* @return {@link List} of levels; each level contains {@link Set} of identifiers of type {@link T}
*/
- protected final @NonNull List<Set<T>> parseFields(final @NonNull InstanceIdentifierContext<?> identifier,
+ protected final @NonNull List<Set<T>> parseFields(final @NonNull InstanceIdentifierContext identifier,
final @NonNull FieldsParam input) {
final DataSchemaContextNode<?> startNode = DataSchemaContextNode.fromDataSchemaNode(
(DataSchemaNode) identifier.getSchemaNode());