protected synchronized void addSoftwareIdentifiers(Set<Identifier> identifiers) {
        this.softwareIdentifiers.addAll(identifiers);
    }
@Test
    public void testAddSoftwareIdentifiers() {
        Set<Identifier> identifiers = new HashSet<>();
        Dependency instance = new Dependency();
        instance.addSoftwareIdentifiers(identifiers);
        assertNotNull(instance.getSoftwareIdentifiers());
    }