class_docstr: Base class used to display multiple child widgets.
docstr: Gets the title of a container page.
  Parameters
  ----------
  index : int
      Index of the container page
docstr_tok: ["Gets","the","title","of","a","container","page",".","Parameters","--","--","--","--","--","index",":","int","Index","of","the","container","page"]
code: def get_title(self, index):
      """Gets the title of a container page.
      Parameters
      ----------
      index : int
          Index of the container page
      """
      return self.titles[index]
  
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 7 for calling the _SelectionContainer obj's underlying member method code with example usage: obj.get_title(index) and returns: self