@Test
    public void shouldSupplyNewBulkSetOnEachInvocation() {
        final BulkSet<Object> l1 = BulkSetSupplier.instance().get();
        final BulkSet<Object> l2 = BulkSetSupplier.instance().get();
        final BulkSet<Object> l3 = BulkSetSupplier.instance().get();

        assertNotSame(l1, l2);
        assertNotSame(l1, l3);
        assertNotSame(l2, l3);
    }
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-core/src/test/java/org/apache/tinkerpop/gremlin/util/function/BulkSetSupplierTest.java