resolve method
Implementation
@override
void resolve() {
super.resolve();
if (superType != null) {
superClass = namespace.memberGet(superType!.id!,
from: namespace.fullName, isRecursive: true);
}
if (isExternal) {
externalClass = interpreter.fetchExternalClass(id!);
}
// for (final decl in namespace.declarations.values) {
// decl.resolve();
// }
}