public static TinkerIoRegistryV1 instance() {
        return INSTANCE;
    }
An implementation of the {@link IoRegistry} interface that provides serializers with custom configurations for
implementation specific classes that might need to be serialized.  This registry allows a {@link TinkerGraph} to
be serialized directly which is useful for moving small graphs around on the network.
<p/>
Most providers need not implement this kind of custom serializer as they will deal with much larger graphs that
wouldn't be practical to serialize in this fashion.  This is a bit of a special case for TinkerGraph given its
in-memory status.  Typical implementations would create serializers for a complex vertex identifier or a
custom data class like a "geographic point".

@author Stephen Mallette (http://stephen.genoprime.com)
tinkergraph-gremlin/src/main/java/org/apache/tinkerpop/gremlin/tinkergraph/structure/TinkerIoRegistryV1.java