original_string: public function arrayStringKeys(Array_ $array)
      {
          $keys = [];
          foreach ($array->items as $item) {
              if ($item->key instanceof String_) {
                  $keys[] = $item->key->value;
              }
          }
  
          return $keys;
      }
code: public function arrayStringKeys(Array_ $array)
      {
          $keys = [];
          foreach ($array->items as $item) {
              if ($item->key instanceof String_) {
                  $keys[] = $item->key->value;
              }
          }
  
          return $keys;
      }
code_tokens: public function arrayStringKeys ( Array_ $ array ) { $ keys = [ ] ; foreach ( $ array -> items as $ item ) { if ( $ item -> key instanceof String_ ) { $ keys [ ] = $ item -> key -> value ; } } return $ keys ; }
docstring: Given an array, find all the string keys.
  
  @param Array_ $array
  
  @return array
docstring_tokens: Given an array find all the string keys .