Describe the bug

The context.pyi does not have stubs for the function overloads specified in environment.py

    @overload
    def get_x_argument(  # type:ignore[misc]
        self, as_dictionary: Literal[False] = ...
    ) -> List[str]:
        ...
    @overload
    def get_x_argument(  # type:ignore[misc]
        self, as_dictionary: Literal[True] = ...
    ) -> Dict[str, str]:
        ...
    def get_x_argument(
        self, as_dictionary: bool = False
    ) -> Union[List[str], Dict[str, str]]:

This will cause typing errors if trying to use:

cmd_line_path = context.get_x_argument(as_dictionary=True).get("dbpath", None)

migrations/env.py:71:21: error: Item "List[str]" of "Union[List[str], Dict[str, str]]" has no attribute "get"  [union-attr]

Since the default typing for the function allows it to return List[str] even though specifying as_dictionary should narrow the return type.

Expected behavior

There should be no typing error once @overload stubs are added

To Reproduce
Please try to provide a Minimal, Complete, and Verifiable example, with the migration script and/or the SQLAlchemy tables or models involved.
See also Reporting Bugs on the website.

# Insert code here

Error

# Copy error here. Please include the full stack trace.

Versions.

OS:
Python:
Alembic:
SQLAlchemy:
Database:
DBAPI:

Additional context

Have a nice day!