POD correction for _id_cache that was breaking Doxygen render.
POD correction for _id_cache that was breaking Doxygen render.

muffato/ensembl,mjg17/ensembl,at7/ensembl,mjg17/ensembl,james-monkeyshines/ensembl,mjg17/ensembl,Ensembl/ensembl,Ensembl/ensembl,willmclaren/ensembl,Ensembl/ensembl,danstaines/ensembl,at7/ensembl,james-monkeyshines/ensembl,james-monkeyshines/ensembl,muffato/ensembl,james-monkeyshines/ensembl,danstaines/ensembl,danstaines/ensembl,mjg17/ensembl,muffato/ensembl,willmclaren/ensembl,muffato/ensembl,Ensembl/ensembl,at7/ensembl,at7/ensembl