@Override
    public Void visitMapKey(final GremlinParser.MapKeyContext ctx) {
        final int keyIndex = ctx.LPAREN() != null && ctx.RPAREN() != null ? 1 : 0;
        visit(ctx.getChild(keyIndex));
        return null;
    }
Converts a Gremlin traversal string into a Java source code representation of that traversal with an aim at
sacrificing some formatting for the ability to compile correctly.
<ul>
    <li>Range syntax has no direct support</li>
    <li>Normalizes whitespace</li>
    <li>Normalize numeric suffixes to lower case</li>
    <li>If floats are not suffixed they will translate as BigDecimal</li>
    <li>Makes anonymous traversals explicit with double underscore</li>
    <li>Makes enums explicit with their proper name</li>
</ul>
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/language/translator/JavaTranslateVisitor.java