Generate a Trailets Config instance for shell widgets using our
        config system

        This lets us create each widget with its own config

def config_options(self):
        """
        Generate a Trailets Config instance for shell widgets using our
        config system

        This lets us create each widget with its own config
        """
        # ---- Jupyter config ----
        try:
            full_cfg = load_pyconfig_files(['jupyter_qtconsole_config.py'],
                                           jupyter_config_dir())

            # From the full config we only select the JupyterWidget section
            # because the others have no effect here.
            cfg = Config({'JupyterWidget': full_cfg.JupyterWidget})
        except:
            cfg = Config()

        # ---- Spyder config ----
        spy_cfg = Config()

        # Make the pager widget a rich one (i.e a QTextEdit)
        spy_cfg.JupyterWidget.kind = 'rich'

        # Gui completion widget
        completion_type_o = self.get_option('completion_type')
        completions = {0: "droplist", 1: "ncurses", 2: "plain"}
        spy_cfg.JupyterWidget.gui_completion = completions[completion_type_o]

        # Pager
        pager_o = self.get_option('use_pager')
        if pager_o:
            spy_cfg.JupyterWidget.paging = 'inside'
        else:
            spy_cfg.JupyterWidget.paging = 'none'

        # Calltips
        calltips_o = self.get_option('show_calltips')
        spy_cfg.JupyterWidget.enable_calltips = calltips_o

        # Buffer size
        buffer_size_o = self.get_option('buffer_size')
        spy_cfg.JupyterWidget.buffer_size = buffer_size_o

        # Prompts
        in_prompt_o = self.get_option('in_prompt')
        out_prompt_o = self.get_option('out_prompt')
        if in_prompt_o:
            spy_cfg.JupyterWidget.in_prompt = in_prompt_o
        if out_prompt_o:
            spy_cfg.JupyterWidget.out_prompt = out_prompt_o

        # Style
        color_scheme = CONF.get('appearance', 'selected')
        style_sheet = create_qss_style(color_scheme)[0]
        spy_cfg.JupyterWidget.style_sheet = style_sheet
        spy_cfg.JupyterWidget.syntax_style = color_scheme

        # Merge QtConsole and Spyder configs. Spyder prefs will have
        # prevalence over QtConsole ones
        cfg._merge(spy_cfg)
        return cfg