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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def sync_focus(self, *_):
 """ Focus the focused window from the pymux arrangement. """

        # Pop-up displayed?
        if self.display_popup:
            self.app.layout.focus(self.layout_manager.popup_dialog)
            return

        # Confirm.
        if self.confirm_text:
            return

        # Custom prompt.
        if self.prompt_command:
            return # Focus prompt

        # Command mode.
        if self.command_mode:
            return # Focus command

        # No windows left, return. We will quit soon.
        if not self.pymux.arrangement.windows:
            return

        pane = self.pymux.arrangement.get_active_pane()
        self.app.layout.focus(pane.terminal)