docs: public MethodNode addMethod(String name,
                                  int modifiers,
                                  ClassNode returnType,
                                  Parameter[] parameters,
                                  ClassNode[] exceptions,
                                  Statement code) {
          MethodNode other = getDeclaredMethod(name, parameters);
          // let's not add duplicate methods
          if (other != null) {
              return other;
          }
          MethodNode node = new MethodNode(name, modifiers, returnType, parameters, exceptions, code);
          addMethod(node);
          return node;
      }