Allow drilldown for search to always be specified as list of lists
To use multiple `drilldown` parameters users had to define
`drilldown` multiple times to be able supply them.
This caused interoperability issues as most languages require
defining query parameters and request bodies as associative
arrays, maps or dictionaries where the keys are unique.
This change enables defining `drilldown` as a list of lists so
that other languages can define multiple drilldown keys and values.
Co-authored-by: Robert Newson <rnewson@apache.org>
2 files changed
