in scripts/lua/lib/redis.lua [348:360]
function _M.resourceToApi(red, resource, snapshotId)
if snapshotId ~= nil then
resource = utils.concatStrings({'snapshots:', snapshotId, ':', resource})
end
resource = hget(red, resource, "resources")
if resource == ngx.null then
return nil
end
resource = cjson.decode(resource)
return resource.apiId
end