original_string: public function file($key) {
      if (!isset($this->files[$key])) {
        return null;
      }
      
      return $this->createFile($this->files[$key]);
    }
code: public function file($key) {
      if (!isset($this->files[$key])) {
        return null;
      }
      
      return $this->createFile($this->files[$key]);
    }
code_tokens: public function file ( $ key ) { if ( ! isset ( $ this -> files [ $ key ] ) ) { return null ; } return $ this -> createFile ( $ this -> files [ $ key ] ) ; }
docstring: Get file by key
  
  @param int $key
  @return \Nuki\Models\Data\File
docstring_tokens: Get file by key