code: function getNative(object, key) {
    var value = getValue(object, key)
    return baseIsNative(value) ? value : undefined
  }
docs: Gets the native function at `key` of `object`.
  
  @private
  @param {Object} object The object to query.
  @param {string} key The key of the method to get.
  @returns {*} Returns the function if it's native, else `undefined`.