code: func (q *Query) Index(indexName string) *Query {
  	if strings.Contains(indexName, ".") {
  		// NOTE: I may reconsider this in the future
  		panic("Nested indexes are not supported.  Only top level structures can be indexed")
  	}
  	q.index = indexName
  	return q
  }
docs: // Index specifies the index to use when running this query