func (mex *messageExchange) checkError() error {
	if err := mex.ctx.Err(); err != nil {
		return GetContextError(err)
	}

	return mex.errCh.checkErr()
}
func (mex *messageExchange) checkError() error {
	if err := mex.ctx.Err(); err != nil {
		return GetContextError(err)
	}

	return mex.errCh.checkErr()
}
func ( mex * messageExchange ) checkError ( ) error { if err := mex . ctx . Err ( ) ; err != nil { return GetContextError ( err ) } return mex . errCh . checkErr ( ) }
// checkError is called before waiting on the mex channels.
// It returns any existing errors (timeout, cancellation, connection errors).
checkError is called before waiting on the mex channels . It returns any existing errors ( timeout cancellation connection errors ) .