ApproxLen would indicate the total number of UIDs in the pack.

CopyUidPack creates a copy of the given UidPack.

Decode decodes the UidPack back into the list of uids.

Encode takes in a list of uids and a block size.

ExactLen would calculate the total number of UIDs.

NewDecoder returns a decoder for the given UidPack and properly initializes it.

SeekCurrent to Seek() a Uid using it as offset, not as part of the results.

SeekStart is used with Seek() to search relative to the Uid, returning it in the results.

Decoder is used to read a pb.UidPack object back into a list of UIDs.

Encoder is used to convert a list of UIDs into a pb.UidPack object.