Rock.Web.UI.Controls.ItemPicker.OnInit C# (CSharp) Method

        protected override void OnInit( EventArgs e )
        {
            base.OnInit( e );
            var sm = ScriptManager.GetCurrent( this.Page );
            EnsureChildControls();

            if ( sm != null )
            {
                sm.RegisterAsyncPostBackControl( _btnSelect );
                sm.RegisterAsyncPostBackControl( _btnSelectNone );
            }
        }