public void describeTo(final Description buffer) {
        buffer.appendText("one of ");
        buffer.appendValueList("{", ", ", "}", this.collection);
    }
Customer matcher than mimics the behavior of the Hamcrest {@code IsIn} but handles {@link Path} using our custom
{@link IsPathEqualToMatcher} to ignore labels.
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/features/IsInMatcher.java