and static method
Implementation
static LogicalQueryOperator and(List<Map<String, dynamic>> values) {
LogicalQueryOperator op = LogicalQueryOperator();
// convert QuerySelector to map, too
values.forEach((element) {
element.forEach((key, value) {
if (value is QueryOperator) {
element[key] = value.values;
}
});
});
op._map["\$and"] = values;
return op;
}