Returns whether a CIDFont subset's CIDSet lists a CID; null when there is no CIDSet.
public bool? ContainsCid(int cid)
The CID.
false for a CID past the end of the table.ISO 32000-2 §9.8.3.1, Table 122: a table of bits indexed by CID, high-order bit first, the most significant bit of the first byte for CID 0. The stream is decoded on each call.