query.go
func (q *Query) Negate() *Query {
	q.headers = append(q.headers, "Negate:")
	return q
}
func (q *Query) Negate() *Query {
	q.headers = append(q.headers, "Negate:")
	return q
}
func ( q * Query ) Negate ( ) * Query { q . headers = append ( q . headers , " " ) return q }
// Negate negates the most recent filter.
Negate negates the most recent filter .