function _handleRequestDelegateContent(oEvent) {
		const oContainer = oEvent.getSource();
		this.retrieveDelegateContent(oContainer, oEvent.getParameter("contentId"));
	}
Opens the value help for the control
to which the <code>ValueHelp</code> element is connected.

<b>Note:</b> This function must only be called by the control the <code>ValueHelp</code> element
belongs to, not by the application.

@param {boolean} bTypeahead Flag that determines whether value help is opened for type-ahead or for complex help

@private
@ui5-restricted sap.ui.mdc.field.FieldBase