+ // TODO:
+ // sequence query with ENSG and anything other than a genomic type will yield
+ // sequences with different IDs which will
+ // break the post-processing stage where DBRefs are assigned to sequences.
+ // -> multiple_sequences = true is needed additional parameter
+ // http://rest.ensembl.org/sequence/id/ENSG00000157764?content-type=text/x-json;type=protein;multiple_sequences=true
+ // result with four transcripts, cds, cdna, and protein products.
+ // *
+ // features for ENG -
+ // http://rest.ensembl.org/overlap/id/ENSG00000157764?feature=cds&feature=exon&feature=transcript&content-type=text/x-gff3
+ // transcript: gives locus, all transcript products with ENSG parents
+ // gene: give all ENSG on locus
+ // exon: all exon boundaries. CDS same info.
+