disable suspend button feature

prefs part

    let disableSuspendButtonFrame = new AM.FrameBox();
    let disableSuspendButtonRow = new AM.FrameBoxRow();
    let disableSuspendButtonLabel = new Gtk.Label({
        label: _("Disable activities hot corner"),
        use_markup: true,
        xalign: 0,
        hexpand: true
    });
    let disableSuspendButtonSwitch = new Gtk.Switch({ halign: Gtk.Align.END });
    disableSuspendButtonSwitch.set_active(this.settings.get_boolean('disable-suspend-button'));
    disableSuspendButtonSwitch.connect('notify::active', Lang.bind(this, function(check) {
        this.settings.set_boolean('disable-suspend-button', check.get_active());
    }));
    disableSuspendButtonRow.add(disableSuspendButtonLabel);
    disableSuspendButtonRow.add(disableSuspendButtonSwitch);
    disableSuspendButtonFrame.add(disableSuspendButtonSwitch);

schema part

   <key type="b" name="disable-suspend-button">
      <default>false</default>
      <summary>Disable suspend button</summary>
      <description>Disable suspend button.</description>
    </key>