src/vs/editor/contrib/codelens/codelensWidget.ts/CodeLensContentWidget/constructor
class CodeLensContentWidget:	constructor(
		editor: IActiveCodeEditor,
		className: string,
		line: number,
	) {
		this._editor = editor;
		this._id = `codelens.widget-${(CodeLensContentWidget._idPool++)}`;

		this.updatePosition(line);

		this._domNode = document.createElement('span');
		this._domNode.className = `codelens-decoration ${className}`;
	}