When feature tracks are lifted-over using a mapping chain, some fields in the feature pop-up which are populated by default (for example, in vcfParser for a VCF file) are lost.
This PR propagates the getDefatulFIPs function of underlying feature source of MappedFeatureSource to ensure that such feature pop-up information are retained.
This seems to be the desired behavior from my use cases, and thought others might find it useful. :)
@dasmoth cc @mdrasmus
When feature tracks are lifted-over using a mapping chain, some fields in the feature pop-up which are populated by default (for example, in
vcfParserfor a VCF file) are lost.This PR propagates the
getDefatulFIPsfunction of underlying feature source ofMappedFeatureSourceto ensure that such feature pop-up information are retained.This seems to be the desired behavior from my use cases, and thought others might find it useful. :)