Antlr3.Tool.ErrorManager.DefaultErrorListener.Warning C# (CSharp) Method

            public virtual void Warning( Message msg )
            {
                String outputMsg = msg.ToString();
                if ( FormatWantsSingleLineMessage() )
                {
                    outputMsg = outputMsg.Replace( '\n', ' ' );
                }
                Console.Error.WriteLine( outputMsg );

                if (ExternalListener != null)
                    ExternalListener.WriteLine(outputMsg);
            }