{"ast":null,"code":"'use strict';\n\nmodule.exports = {\n  isString: function (arg) {\n    return typeof arg === 'string';\n  },\n  isObject: function (arg) {\n    return typeof arg === 'object' && arg !== null;\n  },\n  isNull: function (arg) {\n    return arg === null;\n  },\n  isNullOrUndefined: function (arg) {\n    return arg == null;\n  }\n};","map":null,"metadata":{},"sourceType":"script"}