public static void loadFrom(InputStream in, Proto target) throws Exception {
// Create an input character stream from standard in
ANTLRInputStream input = new ANTLRInputStream(in);
// Create an ExprLexer that feeds from that stream
ProtoLexer lexer = new ProtoLexer(input);
// Create a stream of tokens fed by the lexer
CommonTokenStream tokens = new CommonTokenStream(lexer);
// Create a parser that feeds off the token stream
ProtoParser parser = new ProtoParser(tokens);
// Begin parsing at rule parse
parser.parse(target);
}
