src/vs/workbench/contrib/files/browser/views/openEditorsView.ts/OpenEditorsView/focusActiveEditor
class OpenEditorsView:	private focusActiveEditor(): void {
		if (this.list.length && this.editorGroupService.activeGroup) {
			const index = this.getIndex(this.editorGroupService.activeGroup, this.editorGroupService.activeGroup.activeEditor);
			if (index >= 0) {
				try {
					this.list.setFocus([index]);
					this.list.setSelection([index]);
					this.list.reveal(index);
				} catch (e) {
					// noop list updated in the meantime
				}
				return;
			}
		}

		this.list.setFocus([]);
		this.list.setSelection([]);
	}