code: def _create_config(self, vm, path, content=None):
          
  
          log.info("Creating config file {}".format(path))
          config_dir = os.path.dirname(path)
          try:
              os.makedirs(config_dir, exist_ok=True)
          except OSError as e:
              raise DynamipsError("Could not create Dynamips configs directory: {}".format(e))
  
          if content is None or len(content) == 0:
              content = "!\n"
              if os.path.exists(path):
                  return
  
          try:
              with open(path, "wb") as f:
                  if content:
                      content = "!\n" + content.replace("\r", "")
                      content = content.replace('%h', vm.name)
                      f.write(content.encode("utf-8"))
          except OSError as e:
              raise DynamipsError("Could not create config file '{}': {}".format(path, e))
  
          return os.path.join("configs", os.path.basename(path))
docs: Creates a config file.
  
          :param vm: VM instance
          :param path: path to the destination config file
          :param content: config content
  
          :returns: relative path to the created config file