Factor summary stat code: prep for biotype groups.
Factor summary stat code: prep for biotype groups.

Should be a no-op, except for the code tidy. Means when the methods are available
in core, we need only change the code in one place.

Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode