text: """
  Jinja2 `Environment` manager.
  """
  import jinja2
  
  from mypy_boto3_builder.constants import TEMPLATES_PATH
  
  __all__ = ["JinjaManager"]
  
  
  class JinjaManager:
      """
      Jinja2 `Environment` manager.
      """
  
      _environment = jinja2.Environment(
          loader=jinja2.FileSystemLoader(TEMPLATES_PATH.as_posix()),
          undefined=jinja2.StrictUndefined,
      )
  
      @classmethod
      def update_globals(cls, **kwargs: object) -> None:
          """
          Update global variables in `jinja2.Environment`.
  
          Arguments:
              kwargs -- Globals to set.
          """
          cls._environment.globals.update(kwargs)
  
      @staticmethod
      def escape_md(value: str) -> str:
          """
          Escape underscore characters.
          """
          return value.replace("_", r"\_")
  
      @classmethod
      def get_environment(cls) -> jinja2.Environment:
          """
          Get `jinja2.Environment`.
          """
          cls._environment.filters["escape_md"] = cls.escape_md
          return cls._environment
  