code: def serve_layout() -> dbc.Container:
      """Constructs the app's layout.
  
      Returns
      -------
      dbc.Container
          A Container withholding the layout.
  
      """
      return dbc.Container(
          [
              dbc.Container(
                  html.H1("Data loading and visualization dashboard"),
                  style={"textAlign": "center"},
              ),
              html.Hr(),
              dbc.Row(
                  [
                      # Add file selection layout (+ assign callbacks)
                      dbc.Col(
                          multiple_folder_file_selector(
                              app, name_folder_list
                          ),
                          md=2,
                      ),
                      # Add the graph and the dcc.Store (for serialization)
                      dbc.Col(
                          [
                              dcc.Graph(
                                  id="graph-id", figure=go.Figure()
                              ),
                              dcc.Loading(dcc.Store(id="store")),
                          ],
                          md=10,
                      ),
                  ],
                  align="center",
              ),
          ],
          fluid=True,
      )
  
file_path: plotly-resampler/examples/dash_apps/12_file_selector.py
imports: from pathlib import Path
  from typing import List
  import dash_bootstrap_components
  import plotly.graph_objects
  from dash import callback_context, dcc, html, no_update
  from dash_extensions.enrich import Output, Input, State
  from dash_extensions.enrich import DashProxy, Serverside, ServersideOutputTransform
  from utils.callback_helpers import get_selector_states, multiple_folder_file_selector
  from utils.graph_construction import visualize_multiple_files
  from plotly_resampler import FigureResampler
label_desc: Use image node_id 1 for calling a global function with example usage: serve_layout() and returns: dbc