EDIT

    /**

     * Retrieves top most originals for a {@link SpecimenOrObservationBase} in the derivation graph by recursively

     * walking all {@link DerivationEvent}s.

     * In most cases item in the returned collection will be {@link FieldUnit FieldUnits} but also DerivedUnits are possible, in

     * cases where no FieledUnit exists.

     *

     * @param specimenUuid the UUID of the specimen

     * @param propertyPaths the property path

     * @return either a collection of root units

     */

    public Collection<SpecimenOrObservationBase> findRootUnits(UUID specimenUuid, List<String> propertyPaths);