src/vs/workbench/contrib/preferences/browser/preferencesRenderers.ts/EditSettingRenderer/getEditPreferenceWidgetUnderMouse
class EditSettingRenderer:	private getEditPreferenceWidgetUnderMouse(mouseMoveEvent: IEditorMouseEvent): EditPreferenceWidget<ISetting> | undefined {
		if (mouseMoveEvent.target.type === MouseTargetType.GUTTER_GLYPH_MARGIN) {
			const line = mouseMoveEvent.target.position!.lineNumber;
			if (this.editPreferenceWidgetForMouseMove.getLine() === line && this.editPreferenceWidgetForMouseMove.isVisible()) {
				return this.editPreferenceWidgetForMouseMove;
			}
			if (this.editPreferenceWidgetForCursorPosition.getLine() === line && this.editPreferenceWidgetForCursorPosition.isVisible()) {
				return this.editPreferenceWidgetForCursorPosition;
			}
		}
		return undefined;
	}