class_docstr: Generate unique suffix for each given Node in the DAG.
  Apply monotonic increasing id suffix for duplicated names.
code: def reset(self):
      self.name_to_suffix = dict()
  
file_path: ray/python/ray/dag/utils.py
imports: from typing import Dict
  from ray.dag import DAGNode, InputNode, InputAttributeNode, FunctionNode, ClassNode, ClassMethodNode, MultiOutputNode
label_desc: Use image node_id 3 for calling the _DAGNodeNameGenerator obj's underlying member method code with example usage: obj.reset() without return types