* types. In the key is the field name. The value may be either an
* integer, in which case the field is a little-endian unsigned integer
* encoded in the given number of bytes, or an array, in which case the
* types. In the key is the field name. The value may be either an
* integer, in which case the field is a little-endian unsigned integer
* encoded in the given number of bytes, or an array, in which case the