toggleContents() {
      if (this.breakpoint === this.sizeS && this.sideContentVisibility !== _SideContentVisibility.default.AlwaysShow) {
        this._toggled = !this._toggled;
      }
    }
Toggles visibility of main and side contents on S screen size (mobile device).
@public
@method
@name sap.ui.webc.fiori.DynamicSideContent#toggleContents