class_docstr: A stream that generates a constant value.
class_docstr_tok: ["A","stream","that","generates","a","constant","value","."]
code: def has_next(self):
      return True
  
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 Constant obj's underlying member method code with example usage: obj.has_next() and returns: True