private static boolean isAbsolutePath(String s) {
		return s.startsWith("/") || s.startsWith("\\") ||
			(s.length() > 3 && s.charAt(1) == ':' && (s.charAt(2) == '/' || s.charAt(2) == '\\'));
	}
Returns a dummy DWARFLine instance that contains no information.

@return {@link DWARFLine} instance with no info
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/dwarf/line/DWARFLine.java