class_docstr: Customised layout that returns a default height
class_docstr_tok: ["Customised","layout","that","returns","a","default","height"]
code: def _default_height(self):
      return "420px"
  
file_path: gmaps/gmaps/figure.py
imports: import ipywidgets
  from traitlets import Unicode, Instance, default, link
  from .maps import Map, InitialViewport, GMapsWidgetMixin, map_params_doc_snippets
  from .geotraitlets import MapType, MouseHandling, Tilt
  from .toolbar import Toolbar
  from .errors_box import ErrorsBox
  from ._docutils import doc_subst
label_desc: Use image node_id 1 for calling the FigureLayout obj's underlying member method code with example usage: obj._default_height() and returns: str