class_docstr: Accumulator for count aggregation.
  
  Attributes:
    count: The count of input values.
docstr: Adds 'value' to accumulate.
  
  Args:
    value: value to be added.
code: def add_value(self, value: Any):
      """Adds 'value' to accumulate.
  
      Args:
        value: value to be added.
      """
      self.count += 1
  
imports: import abc
  from typing import Any, List, Sequence
  import pipeline_dp
label_desc: Use image node_id 2 for calling the CountAccumulator obj's underlying member method code with example usage: obj.add_value(value) without return types