queries method
Implementation
JSON queries() {
final JSON value = {};
if (_filter.isNotEmpty) {
value[r"$filter"] = _filter.join(",");
}
if (_expand.isNotEmpty) {
value[r"$expand"] = _expand.join(",");
}
if (_selectAll) {
value[r"$select"] = "*";
} else if (_select.isNotEmpty) {
value[r"$select"] = _select.join(",");
}
return value;
}