import contextlib
from collections.abc import Iterator

class Env:
    def __init__(self) -> None: ...
    def read_env(self) -> None: ...
    @contextlib.contextmanager
    def prefixed(self, prefix: str) -> Iterator[Env]: ...
    def bool(self, name: str, default: bool | None = None) -> bool | None: ...
    def str(self, name: str, default: str | None = None) -> str | None: ...