我想搜索这样的文件，但出现异常。
query = "mimeType ='application/pdf' and properties has { key="+ "'" + agency + "'" +"and value contains"+ "'" + someValue + "'" + " and visibility='PUBLIC'} ";
request = service.files().list().setQ(query);
我们需要按精确值搜索吗？
query = "mimeType ='application/pdf' and properties has { key="+ "'" + agency + "'" +"and value = "+ "'" + someValue + "'" + " and visibility='PUBLIC'} ";
request = service.files().list().setQ(query);
第二个正在工作，但是否有支持通配符的功能？