code: def read(property_path, default_value = nil)
        result = find_value(@config, property_path)
        return (result.nil?) ? default_value : result
      end
docs: Initialized the Config object with either the contents of a provided file
   or a provided hash.
   Reads a property or category from the loaded configuration.
   They can be indexed using a dot-based notation (e.g. "category.property"
   to access "property" under "category").
  
   Returns the specified default if no value found.