class_docstr: An operator stream that accumulates values of a given stream.
  
  Parameters
  ----------
  func : Callable[[T,T], T]
      An accumulator function.
  dtype : str
      The data type of accumulated value.
class_docstr_tok: ["An","operator","stream","that","accumulates","values","of","a","given","stream",".","Parameters","--","--","--","--","--","func",":","Callable","[","[","T",",","T","]",",","T","]","An","accumulator","function",".","dtype",":","str","The","data","type","of","accumulated","value","."]
code: def has_next(self) -> bool:
      return True
  
imports: from typing import Callable, TypeVar
  import numpy
  from tensortrade.feed.core.base import Stream, T
label_desc: Use image node_id 3 for calling the Accumulator obj's underlying member method code with example usage: obj.has_next() and returns: True