[Gmod-ajax] I give up. What is the magic to get subfeatures?

[Paul S. <pau...@gm...>]

I'm trying to create a feature track that contains nested features,
similar to the mRNA track in the Drosophila.

Here is the GFF file that I am using as input,

##gff-version 3
NC_004578	GenBank	gene	8438	15223	.	+	1	ID=1489763;
NC_004578	GenBank	CDS	9000	10000	.	+	1	ID=9695423; Parent:1489763;
NC_004578	GenBank	CDS	11000	12000	.	+	1	ID=9695424; Parent:1489763;

Here is how I am invoking  flatfile-to-json.pl,

./bin/flatfile-to-json.pl --gff2 test.gff --getType --getSubs
--tracklabel test --key test --subfeatureClasses '{"CDS":
"transcript-CDS"}'

I can see that both trackData.json and subfeatures-1.json are being
created in the right track directory.

Here is what gets inserted into trackInfo.js

   {
      "url" : "data/tracks/{refseq}/test/trackData.json",
      "type" : "FeatureTrack",
      "label" : "test",
      "key" : "test"
   }

For starters, I see that "subfeatures":true needs to be added to
trackInfo.js, but what else?

(I tried following the configuration provided for the Drosophila, but
the syntax used for that example and for the for the config file
reference documentation appear to be out of sync with the current
implementation.)

Thanks.