class_docstr: An internal renderable used as a Layout placeholder.
class_docstr_tok: ["An","internal","renderable","used","as","a","Layout","placeholder","."]
code: def __init__(self, layout: "Layout", style: StyleType = "") -> None:
      self.layout = layout
      self.style = style
  
imports: from abc import ABC, abstractmethod
  from itertools import islice
  from operator import itemgetter
  from threading import RLock
  from typing import TYPE_CHECKING, Dict, Iterable, List, NamedTuple, Optional, Sequence, Tuple, Union
  from ._ratio import ratio_resolve
  from .align import Align
  from .console import Console, ConsoleOptions, RenderableType, RenderResult
  from .highlighter import ReprHighlighter
  from .panel import Panel
  from .pretty import Pretty
  from .region import Region
  from .repr import Result, rich_repr
  from .segment import Segment
  from .style import StyleType
label_desc: Use image node_id 1 to create a new _Placeholder object  with example: obj = _Placeholder(layout, style)