RowMutationType type = mutation.rowMutationType;
switch (type) {
case REPLACE_ROW:
Row row = MutationHelper.getRowFromMutations(mutation.rowId, mutation.recordMutations);
blurIndex.replaceRow(mutation.waitToBeVisible, mutation.wal, updateMetrics(row));
break;
case UPDATE_ROW:
doUpdateRowMutation(mutation, blurIndex);
break;
case DELETE_ROW: