Add the flush() method:
Add the flush() method:

  Flushes (deletes) all cached data not associated with the current
  slice.

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