How to add sub menu items clicking on MenuItems in xamarin.forms MasterDetailPage

Hi, I want to display submenu items when clicking on MenuItems in MasterDetailPage.My Master Xaml is like

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="HomeMaster"
             Title="Master">
  <StackLayout>
        <ListView x:Name="ListViewMenuItems"
              SeparatorVisibility="None"
              HasUnevenRows="true"
              ItemsSource="{Binding MenuItems}">
            <ListView.Header>
                <Grid BackgroundColor="Transparent">
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="10"/>
                        <ColumnDefinition Width="*"/>
                        <ColumnDefinition Width="10"/>
                    </Grid.ColumnDefinitions>
                    <Grid.RowDefinitions>
                        <RowDefinition Height="30"/>
                        <RowDefinition Height="30"/>
                        <RowDefinition Height="Auto"/>
                        <RowDefinition Height="10"/>
                    </Grid.RowDefinitions>
                    <Image
              Grid.Column="1"
              Grid.Row="2"
              Source="User.png" HeightRequest="100" x:Name="userImg"/>
                </Grid>
            </ListView.Header>
            <ListView.ItemTemplate>
                <DataTemplate>
                    <ViewCell>
                            <StackLayout VerticalOptions="FillAndExpand"
                             Orientation="Horizontal"
                             Padding="20,10,0,10"
                             Spacing="20">

                                <Image Source="{Binding Icon}"
                         WidthRequest="40"
                         HeightRequest="40"
                         VerticalOptions="Center" />

                                <Label Text="{Binding Title}"
                         FontSize="Medium"
                         VerticalOptions="Center"
                         TextColor="Black"/>
                            </StackLayout>
                     </ViewCell>
                </DataTemplate>
            </ListView.ItemTemplate>
        </ListView>
    </StackLayout>
</ContentPage>

I want to add submenu items when click on MenuItem like expandable list .How can I do this.
Thank you.