_navToWizardStep(oStep) {
			const oNavContainer = this.byId("wizardNavContainer");
			const _fnAfterNavigate = () => {
				this.byId("shoppingCartWizard").goToStep(oStep);
				// detaches itself after navigation
				oNavContainer.detachAfterNavigate(_fnAfterNavigate);
			};

			oNavContainer.attachAfterNavigate(_fnAfterNavigate);
			oNavContainer.to(this.byId("wizardContentPage"));
		}
Navigates to WizardStep.
@param {Object} oStep WizardStep DOM element