private String tryUpdateDataFilePath(final String docString) {
        final Matcher matcher = ioPattern.matcher(docString);
        if (! matcher.matches()) { return docString; }
        final String relPath = matcher.group(1);
        final String absPath = world.changePathToDataFile(relPath);
        return docString.replace(relPath, escapeJava(absPath));
    }
Reuse edge triplet syntax for VertexProperty: vp[vertexName-key->value]
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/features/StepDefinition.java