class_docstr: Displays children each on a separate accordion tab.
code: def __init__(self, children=(), **kwargs):
      if len(children) > 0 and "selected_index" not in kwargs:
          kwargs["selected_index"] = 0
      super().__init__(children=children, **kwargs)
  
imports: from .widget_box import Box
  from .widget import register
  from .widget_core import CoreWidget
  from traitlets import Unicode, Dict, CInt, TraitError, validate, observe
  from .trait_types import TypedTuple
  from itertools import chain, repeat, islice
label_desc: Use image node_id 1 to create a new Tab object from inherited base classes: _SelectionContainer with example: obj = Tab(children)