code: def get_or_default_template_file_name(ctx, param, provided_value, include_build):
      
  
      search_paths = [
          "template.yaml",
          "template.yml",
      ]
  
      if include_build:
          search_paths.insert(0, os.path.join(".aws-sam", "build", "template.yaml"))
  
      if provided_value == _TEMPLATE_OPTION_DEFAULT_VALUE:
          # Default value was used. Value can either be template.yaml or template.yml. Decide based on which file exists
          # .yml is the default, even if it does not exist.
          provided_value = "template.yml"
  
          for option in search_paths:
              if os.path.exists(option):
                  provided_value = option
                  break
  
      result = os.path.abspath(provided_value)
      LOG.debug("Using SAM Template at %s", result)
      return result
docs: Default value for the template file name option is more complex than what Click can handle.
      This method either returns user provided file name or one of the two default options (template.yaml/template.yml)
      depending on the file that exists
  
      :param ctx: Click Context
      :param param: Param name
      :param provided_value: Value provided by Click. It could either be the default value or provided by user.
      :return: Actual value to be used in the CLI