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{"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"}