doSetField method
Implementation
void doSetField(String field, String? alias) {
mFields ??= [];
mFieldAliases ??= HashMap<String, String?>();
if (mFieldAliases!.containsKey(field) && mFieldAliases![field] == alias) {
return;
}
mFieldAliases![field] = alias;
mFields!.add(FieldNode(field, alias));
}