@FeatureDescriptor(name = FEATURE_DUPLICATE_MULTI_PROPERTIES)
            default boolean supportsDuplicateMultiProperties() {
                return supportsMultiProperties();
            }
Determines if a {@link Vertex} can support non-unique values on the same key. For this value to be
{@code true}, then {@link #supportsMetaProperties()} must also return true. By default this method,
just returns what {@link #supportsMultiProperties()} returns.
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/Graph.java