PydanticSchemaGenerationError,
    Undefined,
    annotation_is_pydantic_v1,
)
from fastapi.datastructures import DefaultPlaceholder, DefaultType
from fastapi.exceptions import FastAPIDeprecationWarning, PydanticV1NotSupportedError
from pydantic.fields import FieldInfo

from ._compat import v2

if TYPE_CHECKING:  # pragma: nocover
    from .routing import APIRoute