class_docstr: Pushes a range onto a stack of nested range span.
  Stores zero-based depth of the range that is started.
  
  Args:
      msg: ASCII message to associate with range
code: def __init__(self, msg: str) -> None:
      self.msg = msg
      self.depth = None
  
imports: from __future__ import annotations
  from monai.transforms.traits import RandomizableTrait
  from monai.transforms.transform import Transform
  from monai.utils import optional_import
label_desc: Use image node_id 1 to create a new RangePush object from inherited base classes: Transform with example: obj = RangePush(msg)