only run if variation API installed
only run if variation API installed

james-monkeyshines/ensembl,Ensembl/ensembl,muffato/ensembl,Ensembl/ensembl,james-monkeyshines/ensembl,james-monkeyshines/ensembl,muffato/ensembl,james-monkeyshines/ensembl,Ensembl/ensembl,muffato/ensembl,Ensembl/ensembl,muffato/ensembl