pyanalyze doesn't support defining TypeVar under if TYPE_CHECKING

[hauntsaninja]

from typing import TYPE_CHECKING, TypeVar

if TYPE_CHECKING:
    _TypeT = TypeVar("_TypeT", bound=type)

    def c(cls: _TypeT) -> None:
        ...

gives:

Unrecognized annotation typing.TypeVar (code: invalid_annotation)
In b.py at line 6
   3: if TYPE_CHECKING:
   4:     _TypeT = TypeVar("_TypeT", bound=type)
   5: 
   6:     def c(cls: _TypeT) -> None:
                     ^
   7:         ...