public void initGet() {
		if (streamNumber == MsfStream.NIL_STREAM_NUMBER) {
			return;
		}
		nextRetrieveOffset = startOffset;
		currentOffset = nextRetrieveOffset;
		symLen = retrieveRecord();
	}
Initialized the mechanism for requesting the symbols in sequence.
@see #hasNext()
Ghidra/Features/PDB/src/main/java/ghidra/app/util/bin/format/pdb2/pdbreader/MsSymbolIterator.java