code: private function printVars(Stmt\ClassMethod $node, array $varsInMethodSign)
      {
          $var = '';
          $vars = array_diff(array_unique(array_filter($this->collectVars($node))), $varsInMethodSign);
          if (!empty($vars)) {
              $var .= "\n    var ".implode(', ', $vars).";\n";
          }
          
          // dirty...
          Printer\Expr\ArrayDimFetchPrinter::resetCreatedVars();
  
          return $var;
      }
docs: @param Stmt\ClassMethod $node
  @param array            $varsInMethodSign
  
  @return string