extensions/markdown-language-features/src/features/previewManager.ts/MarkdownPreviewManager/openDynamicPreview
class MarkdownPreviewManager:	public openDynamicPreview(
		resource: vscode.Uri,
		settings: DynamicPreviewSettings
	): void {
		let preview = this._dynamicPreviews.get(resource, settings);
		if (preview) {
			preview.reveal(settings.previewColumn);
		} else {
			preview = this.createNewDynamicPreview(resource, settings);
		}

		preview.update(
			resource,
			resource.fragment ? new StartingScrollFragment(resource.fragment) : undefined
		);
	}