class_docstr: Accumulator for count aggregation.
  
  Attributes:
    count: The count of input values.
docstr: Computes and returns the result of aggregation.
  
  Returns:
    Count of the values.
code: def compute_metrics(self) -> float:
      """Computes and returns the result of aggregation.
  
      Returns:
        Count of the values.
      """
      return self.count
  
imports: import abc
  from typing import Any, List, Sequence
  import pipeline_dp
label_desc: Use image node_id 4 for calling the CountAccumulator obj's underlying member method code with example usage: obj.compute_metrics() and returns: self