src/vs/workbench/contrib/extensions/browser/extensionsViews.ts/ExtensionsListView/isSearchWorkspaceUnsupportedExtensionsQuery
class ExtensionsListView:	static isSearchWorkspaceUnsupportedExtensionsQuery(query: string): boolean {
		return /^\s*@workspaceUnsupported(:(untrusted|virtual)(Partial)?)?(\s|$)/i.test(query);
	}