--- /dev/null
+// helper for String#{startsWith, endsWith, includes}
+var isRegExp = require('./_is-regexp')
+ , defined = require('./_defined');
+
+module.exports = function(that, searchString, NAME){
+ if(isRegExp(searchString))throw TypeError('String#' + NAME + " doesn't accept regex!");
+ return String(defined(that));
+};
\ No newline at end of file