@Override
	void deserializeStreamInfo(PdbByteReader reader)
			throws IOException, PdbException, CancelledException {

		// Parse the length of the overall (larger) stream.
		deserializeStreamLengthAndMapTableAddress(reader);
		// Calculate the length of the subStream which contains all of the page numbers necessary
		// for the overall (larger) stream and create a subStream with this calculated length.
		int subStreamLength =
			Msf.floorDivisionWithLog2Divisor(streamLength, msf.getLog2PageSize()) *
				msf.getPageNumberSize();

		MsfStream subStream = new MsfStream(msf, subStreamLength);
		// Parse the page numbers of the subStream.
		subStream.deserializePageNumbers(reader);
		// Now read the whole subStream, creating a new byte array.
		byte[] bytes = subStream.read(0, subStreamLength);
		PdbByteReader pageNumberReader = new PdbByteReader(bytes);
		// Next parse the page numbers for the overall (larger) stream from this new byte array
		// that was read from the subStream.
		deserializePageNumbers(pageNumberReader);
		// The overall (larger) stream has now been set up with the overall stream length
		// and its page numbers parsed.
	}
Deserializes Stream information from the bytes parameter starting at the index offset
 and uses it to provide necessary information for the Stream to be usable.
 The information from the deserialization of the byte parameter then points to additional
 {@link Msf} pages that need to be read as a subStream and deserialized to create
 the {@link MsfDirectoryStream700}.
 <P>
 Generally, deserialization is part of the step of loading the Stream information from
 persistent storage (disk).
@param reader {@link PdbByteReader} from which to parse the information
@throws IOException on file seek or read, invalid parameters, bad file configuration, or
 inability to read required bytes
@throws PdbException upon not enough data left to parse
@throws CancelledException upon user cancellation
Ghidra/Features/PDB/src/main/java/ghidra/app/util/bin/format/pdb2/pdbreader/msf/MsfDirectoryStream700.java