def METHOD_NAME(self):
    """* Creates and saves a Spectrum node if there is none with the default config values ("ELECTRUM_DEFAULT_OPTION")
    * Starts Spectrum
    * Switches to the Spectrum node
    """
    if not self.is_spectrum_node_available:
        # No SpectrumNode yet created. Let's do that.
        default_electrum = app.config["ELECTRUM_DEFAULT_OPTION"]
        spectrum_node = SpectrumNode(
            host=app.config["ELECTRUM_OPTIONS"][default_electrum]["host"],
            port=app.config["ELECTRUM_OPTIONS"][default_electrum]["port"],
            ssl=app.config["ELECTRUM_OPTIONS"][default_electrum]["ssl"],
        )
        app.specter.node_manager.nodes[spectrum_node_alias] = spectrum_node
        app.specter.node_manager.save_node(spectrum_node)
    self.spectrum_node.start_spectrum(app, self.data_folder)
    self.activate_spectrum_node()