def METHOD_NAME(self):
    """Update label to show upcoming folder name."""
    name = self.ui.lineEdit_name.text()
    default = "Folder:"
    if name == "":
        self.ui.label_folder.setText(default)
    else:
        folder_name = name.lower().replace(" ", "_")
        msg = default + " " + folder_name
        self.ui.label_folder.setText(msg)