extensions/npm/src/npmView.ts/PackageJSON/constructor
class PackageJSON:	constructor(folder: Folder, relativePath: string) {
		super(PackageJSON.getLabel(relativePath), TreeItemCollapsibleState.Expanded);
		this.folder = folder;
		this.path = relativePath;
		this.contextValue = 'packageJSON';
		if (relativePath) {
			this.resourceUri = Uri.file(path.join(folder!.resourceUri!.fsPath, relativePath, packageName));
		} else {
			this.resourceUri = Uri.file(path.join(folder!.resourceUri!.fsPath, packageName));
		}
		this.iconPath = ThemeIcon.File;
	}