private String getContents() {
            StringBuilder ret = new StringBuilder();
            BufferedReader reader = new BufferedReader(getReader());
            try {
                String str = reader.readLine();
                while (str != null){
                    ret.append(str);
                    str = reader.readLine();
                    if (str != null) {
                        ret.append("\n");
                    }
                }
                reader.close();
            } catch (IOException e) {
                throw new IllegalArgumentException("Failed reading contents of def-file '" + defName +
                        ".def in component " + bundle.jarFile.getName(),e);
            }
            return ret.toString();
        }
Returns the namespace of the .def-file, as given by the "namespace=" statement inside the given entry.
@return  The namespace string, or "" (empty string) if no namespace exists
config-application-package/src/main/java/com/yahoo/config/model/application/provider/Bundle.java