public function getFileBody()
    {
        if (!isset($this->_fileBody)) {
            if (is_file($this->_srcFilePath)) {
                $this->_fileBody = file_get_contents($this->_srcFilePath);
            } else {
                $this->errmsg = Yii::t($this->tc, "Source file '{file}' not found", ['file' => $this->_srcFilePath]);
                return false;
            }
        }
        return $this->_fileBody;
    }