final int getSize() {
        int size = 8;
        if (code.length > 0) {
            cw.newUTF8("Code");
            size += 18 + code.length + 8 * 0;
        }
        if (exceptionCount > 0) {
            cw.newUTF8("Exceptions");
            size += 8 + 2 * exceptionCount;
        }
        return size;
    }
Returns the size of the bytecode of this method.

@return the size of the bytecode of this method.
src/main/java/com/alibaba/fastjson/asm/MethodWriter.java