src/vs/workbench/contrib/timeline/browser/timelinePane.ts/TimelinePane/followActiveEditor
class TimelinePane:	set followActiveEditor(value: boolean) {
		if (this._followActiveEditor === value) {
			return;
		}

		this._followActiveEditor = value;
		this.followActiveEditorContext.set(value);

		this.updateFilename(this._filename);

		if (value) {
			this.onActiveEditorChanged();
		}
	}