How to use the @paypal/sdk-constants/src.PLATFORM.DESKTOP function in @paypal/sdk-constants

export const DEFAULT_STYLE = {
    LAYOUT: BUTTON_LAYOUT.VERTICAL,
    COLOR:  BUTTON_COLOR.GOLD,
    SHAPE:  BUTTON_SHAPE.RECT
};

export const DEFAULT_PROPS = {
    LOCALE:   {
        country: COUNTRY.US,
        lang:    LANG.EN
    },
    COMMIT:   COMMIT.TRUE,
    VAULT:    VAULT.FALSE,
    INTENT:   INTENT.CAPTURE,
    ENV:      ENV.PRODUCTION,
    PLATFORM: PLATFORM.DESKTOP
};

// $FlowFixMe
export function normalizeButtonStyle(style : ButtonStyleInputs) : ButtonStyle {

    if (!style) {
        throw new Error(`Expected props.style to be set`);
    }

    const {
        label,
        layout = DEFAULT_STYLE.LAYOUT,
        color = DEFAULT_STYLE.COLOR,
        shape = DEFAULT_STYLE.SHAPE,
        tagline = (layout === BUTTON_LAYOUT.HORIZONTAL),
        height,

export const DEFAULT_STYLE = {
    LAYOUT: BUTTON_LAYOUT.VERTICAL,
    COLOR:  BUTTON_COLOR.GOLD,
    SHAPE:  BUTTON_SHAPE.RECT
};

export const DEFAULT_PROPS = {
    LOCALE:   {
        country: COUNTRY.US,
        lang:    LANG.EN
    },
    COMMIT:   COMMIT.TRUE,
    VAULT:    VAULT.FALSE,
    INTENT:   INTENT.CAPTURE,
    ENV:      ENV.PRODUCTION,
    PLATFORM: PLATFORM.DESKTOP
};

// $FlowFixMe
export function normalizeButtonStyle(style : ButtonStyleInputs) : ButtonStyle {

    if (!style) {
        throw new Error(`Expected props.style to be set`);
    }

    const {
        label,
        layout = DEFAULT_STYLE.LAYOUT,
        color = DEFAULT_STYLE.COLOR,
        shape = DEFAULT_STYLE.SHAPE,
        tagline = (layout === BUTTON_LAYOUT.HORIZONTAL),
        height,

},
                onError: (err) => {
                    throw err;
                }
            };
        },
        postRobot: {
            on:   () => ({ cancel: noop }),
            once: () => cancelablePromise(ZalgoPromise.resolve()),
            send: () => cancelablePromise(ZalgoPromise.resolve())
        }
    };

    window.xprops = {
        clientID:        'xyz123',
        platform:        PLATFORM.DESKTOP,
        intent:          INTENT.CAPTURE,
        currency:        CURRENCY.USD,
        commit:          true,
        env:             'test',
        buttonSessionID: uniqueID(),
        createOrder:     mockAsyncProp(() => {
            return 'XXXXXXXXXX';
        }),
        style: {

        },
        locale: {
            country: 'US',
            lang:    'en'
        },
        onInit:    mockAsyncProp(noop),

value() : string {
                        return isDevice() ? PLATFORM.MOBILE : PLATFORM.DESKTOP;
                    }
                },

handleClick : boolean,
    colors : $ReadOnlyArray<$Values>,
    secondaryColors : { [$Values] : $Values },
    secondaryVaultColors : { [$Values] : $Values },
    logoColors : { [$Values] : $Values },
    shapes : $ReadOnlyArray<$Values>
|};

export const DEFAULT_FUNDING_CONFIG : FundingSourceConfig = {

    layouts: [
        BUTTON_LAYOUT.VERTICAL
    ],

    platforms: [
        PLATFORM.DESKTOP,
        PLATFORM.MOBILE
    ],

    handleClick: false,

    colors: [
        BUTTON_COLOR.SILVER,
        BUTTON_COLOR.BLACK,
        BUTTON_COLOR.WHITE
    ],

    logoColors: {
        [ BUTTON_COLOR.BLACK ]: LOGO_COLOR.WHITE
    },

    shapes: [