code: function baseIsNative(value) {
      if (!isObject(value) || isMasked(value)) {
        return false;
      }
      var pattern = isFunction(value) || isHostObject(value) ? reIsNative : reIsHostCtor;
      return pattern.test(toSource(value));
    }
docs: The base implementation of `_.isNative` without bad shim checks.
  
  @private
  @param {*} value The value to check.
  @returns {boolean} Returns `true` if `value` is a native function,
  else `false`.