constructor(message, startOffset, endOffset, line, column) {
        super()
        Error.captureStackTrace(this, RTCodeError)
        this.name = 'RTCodeError'
        this.message = message || ''
        this.index = norm(startOffset)
        this.startOffset = norm(startOffset)
        this.endOffset = norm(endOffset)
        this.line = norm(line)
        this.column = norm(column)
    }
@param {string} message
@param {number=} startOffset
@param {number=} endOffset
@param {number=} line
@param {number=} column