public String getFilePath(int index, boolean includePath) {
		try {
			DWARFFile f = getFile(index);
			if (!includePath) {
				return f.getName();
			}

			String dir = f.getDirectoryIndex() >= 0 ? getDir(f.getDirectoryIndex()).getName() : "";

			return FSUtilities.appendPath(dir, f.getName());
		}
		catch (IOException e) {
			return null;
		}
	}
Returns the number of indexed files
@return num files
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/dwarf/line/DWARFLine.java