public function getInsertables($text)
 {
     $insertables = parent::getInsertables($text);
     // Translatable pages allow naming the variables. Basically anything is
     // allowed in a variable name, but here we are stricter to avoid too many
     // false positives.
     $matches = array();
     preg_match_all('/\\$([a-zA-Z0-9-_]+)/', $text, $matches, PREG_SET_ORDER);
     $new = array_map(function ($match) {
         // Numerical ones are already handled by parent
         if (ctype_digit($match[1])) {
             return null;
         }
         return new Insertable($match[0], $match[0]);
     }, $matches);
     $new = array_filter($new);
     $insertables = array_merge($insertables, $new);
     return $insertables;
 }
 /**
  * @dataProvider getInsertablesProvider
  */
 public function testGetInsertables($input, $expected)
 {
     $suggester = new MediaWikiInsertablesSuggester();
     $this->assertEquals($expected, $suggester->getInsertables($input));
 }