code: def get() -> DslContextRegistry:
      """Gets the current active registry that observes DSL definitions."""
      if not getattr(_registry_holder, "current", None):
          _registry_holder.current = DslContextRegistry()
      return _registry_holder.current
  
imports: import collections
  import contextlib
  import threading
  from typing import Any, List, Optional, Iterator
  from tfx.dsl.context_managers import dsl_context
label_desc: Use image node_id 2 for calling a global function with example usage: get() and returns: _registry_holder