ENSWEB-4692: function to build json file for widgets.ensembl
ENSWEB-4692: function to build json file for widgets.ensembl

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