@Override
        public void write(ByteBuffer buffer, Object o) {
            byte[] bytes = Utils.utf8((String) o);
            if (bytes.length > Short.MAX_VALUE)
                throw new SchemaException("String length " + bytes.length + " is larger than the maximum string length.");
            buffer.putShort((short) bytes.length);
            buffer.put(bytes);
        }
The Boolean type represents a boolean value in a byte by using
the value of 0 to represent false, and 1 to represent true.

If for some reason a value that is not 0 or 1 is read,
then any non-zero value will return true.
clients/src/main/java/org/apache/kafka/common/protocol/types/Type.java