Bump to v4.1.0.

_isLaziable.js

@@ -0,0 +1,25 @@
+define(['./_LazyWrapper', './_getData', './_getFuncName', './wrapperLodash'], function(LazyWrapper, getData, getFuncName, lodash) {
+
+  /**
+   * Checks if `func` has a lazy counterpart.
+   *
+   * @private
+   * @param {Function} func The function to check.
+   * @returns {boolean} Returns `true` if `func` has a lazy counterpart, else `false`.
+   */
+  function isLaziable(func) {
+    var funcName = getFuncName(func),
+        other = lodash[funcName];
+
+    if (typeof other != 'function' || !(funcName in LazyWrapper.prototype)) {
+      return false;
+    }
+    if (func === other) {
+      return true;
+    }
+    var data = getData(other);
+    return !!data && func === data[0];
+  }
+
+  return isLaziable;
+});