OptionalconvertWhen true, up-converts version 1 data to version 2 format by wrapping
scalar values in arrays for inner-list keys (e.g., bl, br, mtp).
This ensures a consistent data shape regardless of the source version, mirroring the down-conversion that occurs during encoding.
OptionaluseControls how RFC 8941 token values are represented in the decoded
data. When omitted, tokens are reduced to plain strings, which cannot
be told apart from string values on re-encoding. true decodes
tokens as registry Symbols and false as SfToken instances;
either preserved representation re-encodes as a bare token, so a
decode/encode round trip keeps the wire bytes.
Options for decoding CMCD data.