applyExtensionPoint(oExtensionPoint) {
			var oPromise = applyExtensionPoint(oExtensionPoint, false);
			Applier.addPreConditionForInitialChangeApplying(oPromise);
			return oPromise;
		}
Registration of extension points for the creation process in designtime.
As well as creation of default content of extension point or preparation of flex changes
based on the extension points to be able to be applied.

@param {sap.ui.core.ExtensionPoint} oExtensionPoint - info object with extension point information
@returns {Promise} resolves when default content is created or related changes are prepared for application