IsBigList returns true if table count > uint8 or element offset > uint16.

IsBigList returns true if any field tag > uint8 or offset > uint16.

tag(2) + offset(4).

tag(1) + offset(2).

ListElement specifies a value offset in a list byte array.

ListTable is a serialized array of list element offsets ordered by index.

MessageField specifies a tag and a value offset in a message byte array.

MessageTable is a table of message fields ordered by tags.

Bytes is a spec byte slice backed by a buffer.

String is a spec string backed by a buffer.

Type specifies a value type.