public void removeField(String oldName) {
ClassNode r = redirect();
if (r.fieldIndex == null) r.fieldIndex = new HashMap<String, FieldNode>();
final Map<String, FieldNode> index = r.fieldIndex;
r.fields.remove(index.get(oldName));
index.remove(oldName);
}
public void renameField(String oldName, String newName) {
ClassNode r = redirect();
if (r.fieldIndex == null) r.fieldIndex = new HashMap<String, FieldNode>();
final Map<String, FieldNode> index = r.fieldIndex;
index.put(newName, index.remove(oldName));
}