elasticsearch函数中对过滤器的嵌套支持

它已经实现：

_client.Search<ElasticsearchProject>(s =>  s.Query(q=>q     .FunctionScore(fs=>fs.Functions(         f=>f  .scriptScore(ss=>ss.script("25"))  .Filter(ff=>ff.Term(t=>t.Country, "A")),         f=> f  .scriptScore(ss=>ss.script("15"))  .Filter(ff=>ff.Term("a","b")))     .ScoreMode(FunctionScoreMode.first)     .BoostMode(FunctionBoostMode.sum))));