public Builder loadCustomModules(final boolean loadCustomModules) {
            this.loadCustomModules = loadCustomModules;
            return this;
        }
Try to load {@code SimpleModule} instances from the current classpath.  These are loaded in addition to
the one supplied to the {@link #addCustomModule(SimpleModule)};
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphson/LegacyGraphSONReader.java