code: public function setFilePath(string $viewFilePath): void
      {
          if (!is_readable($viewFilePath)) {
              throw new Exception("The View file {$viewFilePath} isn't readable.");
          }
          $this->filePath = $viewFilePath;
      }
docs: It assosiates the object with view file.
  @param string $viewFilePath The path to the file with view markup.
  @return void
  @throws \nadir2\core\Exception It throws if file isn't readable.