private static GraphTraversal<?, ?> transform(final E_GreaterThanOrEqual expression) {
        final Object value = expression.getArg2().getConstant().getNode().getLiteralValue();
        return __.as(expression.getArg1().getVarName()).is(P.gte(value));
    }
Converts a general {@code Expr} to an anonymous {@link GraphTraversal}.
sparql-gremlin/src/main/java/org/apache/tinkerpop/gremlin/sparql/WhereTraversalBuilder.java