code: public static Properties readInternalConfiguration()
      {
          //init properties
          Properties properties=new Properties();
          
          //get class loader
          ClassLoader classLoader=ReflectionHelper.getThreadContextClassLoader();
  
          //load internal properties
          InputStream inputStream=classLoader.getResourceAsStream("org/fax4j/"+LibraryConfigurationLoader.CONFIGURATION_FILE_NAME);
          LibraryConfigurationLoader.loadProperties(properties,inputStream,true);
  
          return properties;
      }
docs: This function reads and returns the internal fax4j properties.
  
  @return  The fax4j.properties data