## Not run:
# search_shards(index = "plos")
# search_shards(index = c("plos","gbif"))
# search_shards(index = "plos", preference='_primary')
# search_shards(index = "plos", preference='_shards:2')
#
# library('httr')
# search_shards(index = "plos", config=verbose())
# ## End(Not run)
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