function isSuitableAsContainer(oContainer) {
		var oContentAggInfo = oContainer.getMetadata().getAggregation("content");
		if (oContentAggInfo) {
			return oContentAggInfo.multiple && oContentAggInfo.type === "sap.ui.core.Control";
		}
		// use duck typing to allow placeAt even when there's no 'content' aggregation available.
		// TODO This is a workaround for sap.ui.commons.AbsoluteLayout, abandon when it's removed
		return (
			typeof oContainer.addContent === "function"
			&& typeof oContainer.insertContent === "function"
			&& typeof oContainer.removeAllContent === "function"
		);
	}
Checks whether the given UI5 element is suitable as a container for placeAt
@param {sap.ui.core.Element} oContainer
@returns {boolean} Whether the given UI5 element is suitable as a container
@private