ChartRangeSource
indexintegernullable
The filter's index in the query's filters, or the time comparison's index; null otherwise.
kindstring
time_range, adhoc_filter, granularity, time_comparison or time_shift.
query_indexinteger
The query it is in.
ChartRangeSource
{
"index": 0,
"kind": "string",
"query_index": 0
}