code: function getErrorSource (err) {
    let result
  
    try {
      const { fileName, lineNumber, columnNumber } = errorStackParser.parse(err).shift()
      result = `${fileName}:${lineNumber}:${columnNumber}`
    } catch (err) {}
  
    return result
  }
docs: @function
  @public
  
  Get source line of error stack.
  
  
  @param {Error} err The error to be analyzed
  @returns {string} The composed source line