Revert "try older coveredby method"
Revert "try older coveredby method"

This reverts commit 18464807a030224bad12742c44a5902fffada0e4.

neozhangthe1/dedupe,tfmorris/dedupe,pombredanne/dedupe,pombredanne/dedupe,davidkunio/dedupe,dedupeio/dedupe,datamade/dedupe,davidkunio/dedupe,neozhangthe1/dedupe,nmiranda/dedupe,datamade/dedupe,01-/dedupe,tfmorris/dedupe,01-/dedupe,nmiranda/dedupe,dedupeio/dedupe