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