func (q *Query) SetFacetMinCount(mc int) {
	q.params.Set("facet.mincount", fmt.Sprintf("%d", mc))
}
mc (Facet min count) https://cwiki.apache.org/confluence/display/solr/Faceting#Faceting-Thefacet.mincountParameter
Example: 5
package solr
import (
	"fmt"
	"net/url"
)
type Query struct {
	params *url.Values
}
func NewQuery() *Query {
	q := new(Query)
	q.params = &url.Values{}
	return q
}
func (q *Query) AddParam(k, v string) {
	q.params.Add(k, v)
}
func (q *Query) RemoveParam(k string) {
	q.params.Del(k)
}
func (q *Query) GetParam(k string) string {
	return q.params.Get(k)
}
func (q *Query) SetParam(k, v string) {
	q.params.Set(k, v)
}
func (qq *Query) Q(q string) {
	qq.params.Add("q", q)
}
func (q *Query) Sort(sort string) {
	q.params.Add("sort", sort)
}
func (q *Query) FilterQuery(fq string) {
	q.params.Add("fq", fq)
}
func (q *Query) FieldList(fl string) {
	q.params.Add("fl", fl)
}
func (q *Query) AddFacet(f string) {
	q.params.Set("facet", "true")
	q.params.Add("facet.field", f)
}
func (q *Query) AddFacetQuery(fq string) {
	q.params.Set("facet", "true")
	q.params.Add("facet.query", fq)
}