FlagIndex

Annotation added for serializing using BluetoothFormat

When applied, the position of the header flag(s) to be used for storing headers will be set to index. If applied to a Boolean, the boolean will be stored as a flag at index instead of within the body itself. If applied to an enum, its ordinal is stored in the flags starting at index, across enough bits for all its cases (i.e. ceil(log2(caseCount))) unless a wider FlagWidth is given.

If the index was already claimed by another property a FlagIndexException may be thrown.