local panelData = {
        type = "panel",
        ....
        displayName = ZO_HIGHLIGHT_TEXT:Colorize("pChat"),
        submenus = true,
        width = 600
    }

whateverControl:SetWhatEver(self:GetValueOrCallback(setting.whatever))

--METHOD: OPEN TO ADDON PANEL--
--opens to a specific addon's option panel
--Usage:
--  panel = userdata; the panel returned by the :RegisterOptionsPanel method
local locSettings = GetString(SI_GAME_MENU_SETTINGS)
function lam:OpenToPanel(panel)
    SCENE_MANAGER:Show("gameMenuInGame")
    zo_callLater(function()
            local settingsMenu = ZO_GameMenu_InGame.gameMenu.headerControls[locSettings]
            settingsMenu:SetOpen(true)
            SCENE_MANAGER:AddFragment(OPTIONS_WINDOW_FRAGMENT)
            KEYBOARD_OPTIONS:ChangePanels(lam.panelID)
            for i, child in pairs(settingsMenu.children) do
                if type(child) == "table" and child.data.name == KEYBOARD_OPTIONS.panelNames[lam.panelID] then
                    ZO_TreeEntry_OnMouseUp(child.control, true)
                    break
                end
            end
            panel:SetHidden(false)
        end, 200)
end

--METHOD: OPEN TO ADDON PANEL--
--opens to a specific addon's option panel
--Usage:
--  panel = userdata; the panel returned by the :RegisterOptionsPanel method
local locSettings = GetString(SI_GAME_MENU_SETTINGS)
function lam:OpenToPanel(panel)
    SCENE_MANAGER:Show("gameMenuInGame")
    zo_callLater(function()
            local settingsMenu = ZO_GameMenu_InGame.gameMenu.headerControls[locSettings]
            settingsMenu:SetOpen(true)
            SCENE_MANAGER:AddFragment(OPTIONS_WINDOW_FRAGMENT)
            KEYBOARD_OPTIONS:ChangePanels(lam.panelID)
            for i, child in pairs(settingsMenu.children) do
                if type(child) == "table" and child.data.name == KEYBOARD_OPTIONS.panelNames[lam.panelID] then
                    ZO_TreeEntry_OnMouseUp(child.control, true)
                    break
                end
            end
            local scroll = LAMAddonPanelsMenuScrollChild
            for i = 1, scroll:GetNumChildren() do
                local button = scroll:GetChild(i)
                if button.panel == panel then
                    zo_callHandler(button, "OnClicked")
                    ZO_Scroll_ScrollControlToTop(LAMAddonPanelsMenu, button)
                    break
                end
            end
        end, 200)
end

local widgetVersion = 7 --should be 8

--own version check
local MAJOR, MINOR = "LibAddonMenu-2.0-classic", 1
local lam, oldminor = LibStub:NewLibrary(MAJOR, MINOR)
if not lam then return end  --the same or newer version of this lib is already loaded into memory
 
-- well known name registration
MAJOR, MINOR = "LibAddonMenu-2.0", 17
lam, oldminor = LibStub:NewLibrary(MAJOR, MINOR)
if not lam then return end  --a settings addon is registered already

--own version check
local MAJOR, MINOR = "LibAddonMenu-2.0-borderless", 1
local lam, oldminor = LibStub:NewLibrary(MAJOR, MINOR)
if not lam then return end  --the same or newer version of this lib is already loaded into memory
 
-- well known name registration
MAJOR, MINOR = "LibAddonMenu-2.0", 17
lam, oldminor = LibStub:NewLibrary(MAJOR, MINOR)
if not lam then return end  --a settings addon is registered already

lam.options = lam.options or {
    isBorderVisible = false,
    useStylizedLeftPanelBackground = true,
    option3 = val,
    option4 = otherVal,
}
 
function lam:RegisterOption(key, value)
    if lam.options[key] then lam.options[key] = value end
end

local LAM = LibStub("LibAddonMenu-2.0")
 
LAM:RegisterOption("isBorderVisible", true)
LAM:RegisterOption("useStylizedLeftPanelBackground", false)

<GuiXml>
    <Controls>
        <Control name="ZO_ComboBox" mouseEnabled="true" virtual="true">
            <Dimensions x="135" y="31" />
            <OnInitialized>
                ZO_ComboBox:New(self)
            </OnInitialized>
 
            <OnMouseUp>
                ZO_ComboBox_DropdownClicked(self)
                PlaySound(SOUNDS.COMBO_CLICK)
            </OnMouseUp>
 
            <Controls>
                <Control name="$(parent)BG" inherits="ZO_InsetBackground"/>
 
                <Label name="$(parent)SelectedItemText" font="ZoFontGame" color="INTERFACE_COLOR_TYPE_TEXT_COLORS:INTERFACE_TEXT_COLOR_SELECTED" wrapMode="ELLIPSIS" verticalAlignment="CENTER">
                    <Anchor point="TOPLEFT" offsetX="8" />
                    <Anchor point="BOTTOMRIGHT" offsetX="-20" />
                </Label>
 
                <Button name="$(parent)OpenDropdown" inherits="ZO_DropdownButton">
                    <Dimensions x="16" y="16" />
                    <Anchor point="RIGHT" offsetX="-3" />
 
                    <OnClicked>
                        ZO_ComboBox_DropdownClicked(self:GetParent())
                    </OnClicked>
                </Button>
            </Controls>
        </Control>
    </Controls>
</GuiXml>