@Override
	protected int getStreamNumber() {
		return ITEM_PROGRAM_INTERFACE_STREAM_NUMBER;
	}
Returns the standard stream number that contains the serialized Item Program Interface
@return the standard stream number that contains the Item Program Interface
Ghidra/Features/PDB/src/main/java/ghidra/app/util/bin/format/pdb2/pdbreader/ItemProgramInterfaceParser.java