@Override
        public final int getFieldNumber(String name)
        {
            if (name.length() != 1)
                return 0;

            switch (name.charAt(0))
            {
                case 'k':
                    return 1;
                case 'v':
                    return 2;
                default:
                    return 0;
            }
        }
The pipe schema of the {@link Map}.
protostuff-collectionschema/src/main/java/io/protostuff/MapSchema.java