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diff --git a/tools/eslint/node_modules/js-yaml/node_modules/argparse/node_modules/lodash/array/flatten.js b/tools/eslint/node_modules/js-yaml/node_modules/argparse/node_modules/lodash/array/flatten.js
new file mode 100644
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+++ b/tools/eslint/node_modules/js-yaml/node_modules/argparse/node_modules/lodash/array/flatten.js
@@ -0,0 +1,32 @@
+var baseFlatten = require('../internal/baseFlatten'),
+    isIterateeCall = require('../internal/isIterateeCall');
+
+/**
+ * Flattens a nested array. If `isDeep` is `true` the array is recursively
+ * flattened, otherwise it is only flattened a single level.
+ *
+ * @static
+ * @memberOf _
+ * @category Array
+ * @param {Array} array The array to flatten.
+ * @param {boolean} [isDeep] Specify a deep flatten.
+ * @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
+ * @returns {Array} Returns the new flattened array.
+ * @example
+ *
+ * _.flatten([1, [2, 3, [4]]]);
+ * // => [1, 2, 3, [4]]
+ *
+ * // using `isDeep`
+ * _.flatten([1, [2, 3, [4]]], true);
+ * // => [1, 2, 3, 4]
+ */
+function flatten(array, isDeep, guard) {
+  var length = array ? array.length : 0;
+  if (guard && isIterateeCall(array, isDeep, guard)) {
+    isDeep = false;
+  }
+  return length ? baseFlatten(array, isDeep) : [];
+}
+
+module.exports = flatten;