code: function isFunction$1(value) {
      if (!isObject$2(value)) {
          return false;
      }
      // The use of `Object#toString` avoids issues with the `typeof` operator
      // in Safari 9 which returns 'object' for typed arrays and other constructors.
      var tag = baseGetTag(value);
      return tag == funcTag$1 || tag == genTag$1 || tag == asyncTag || tag == proxyTag;
  }
docs: Checks if `value` is classified as a `Function` object.
  
  @static
  @memberOf _
  @since 0.1.0
  @category Lang
  @param {*} value The value to check.
  @returns {boolean} Returns `true` if `value` is a function, else `false`.
  @example
  
  _.isFunction(_);
  // => true
  
  _.isFunction(/abc/);
  // => false