@Override
            public void encode(Object obj, JsonStream stream) throws IOException {
                Float number = (Float) obj;
                long bits = Double.doubleToRawLongBits(number.doubleValue());
                Base64.encodeLongBits(bits, stream);
            }
encode float/double as base64, faster than PreciseFloatSupport
src/main/java/com/jsoniter/extra/Base64FloatSupport.java