query method
stringified query, pass the collectionName
to replace the original root collectionName
in output string
Implementation
String query({String? collectionName}) {
final cn = (collectionName is String)
? _collectionNameToGraphQlName(collectionName)
: this.collectionName;
final l = _queryParts();
return "$cn(${l.key}){${l.value}}";
}