:arg in_memory Initialize Configuration instance in memory only
  :type in_memory bool
  :type config_path str
  :type config_name str
  :rtype Configuration
  :return Configuration

def get_instance(in_memory=False, config_path=None, config_name=None):
  """
  :arg in_memory Initialize Configuration instance in memory only
  :type in_memory bool
  :type config_path str
  :type config_name str
  :rtype Configuration
  :return Configuration
  """
  global __conf

  if __conf is None:
    __conf = Configuration(in_memory=in_memory, custom_cfg_path=config_path, config_name=config_name)

  return __conf