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[yaffs-website] / node_modules / grunt-uncss / node_modules / lodash / _isFlattenable.js

diff --git a/node_modules/grunt-uncss/node_modules/lodash/_isFlattenable.js b/node_modules/grunt-uncss/node_modules/lodash/_isFlattenable.js
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+var Symbol = require('./_Symbol'),
+    isArguments = require('./isArguments'),
+    isArray = require('./isArray');
+
+/** Built-in value references. */
+var spreadableSymbol = Symbol ? Symbol.isConcatSpreadable : undefined;
+
+/**
+ * Checks if `value` is a flattenable `arguments` object or array.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is flattenable, else `false`.
+ */
+function isFlattenable(value) {
+  return isArray(value) || isArguments(value) ||
+    !!(spreadableSymbol && value && value[spreadableSymbol]);
+}
+
+module.exports = isFlattenable;