private function createHelpElement() {
		if ( $this->helpInline ) {
			return new LabelWidget( [
				'classes' => [ 'oo-ui-inline-help' ],
				'label' => $this->helpText,
			] );
		} else {
			return new ButtonWidget( [
				'classes' => [ 'oo-ui-fieldLayout-help' ],
				'framed' => false,
				'icon' => 'info',
				'title' => $this->helpText,
				// TODO We have no way to use localisation messages in PHP
				// (and to use different languages when used from MediaWiki)
				// 'label' => msg( 'ooui-field-help' ),
				// 'invisibleLabel' => true,
			] );
		}
	}