class_docstr: A stream that groups together other streams into a dictionary.
class_docstr_tok: ["A","stream","that","groups","together","other","streams","into","a","dictionary","."]
code: def forward(self) -> "Dict[T]":
      return {s.name: s.value for s in self.inputs}
  
imports: import inspect
  from abc import abstractmethod
  from typing import Generic, Iterable, TypeVar, Dict, Any, Callable, List, Tuple
  from tensortrade.core import Observable
  from tensortrade.feed.core.accessors import CachedAccessor
  from tensortrade.feed.core.mixins import DataTypeMixin
label_desc: Use image node_id 3 for calling the Group obj's underlying member method code with example usage: obj.forward() and returns: unknown