values: dict[str, Any]
    errors: list[Any]
    background_tasks: Optional[StarletteBackgroundTasks]
    response: Response
    dependency_cache: dict[DependencyCacheKey, Any]


async def solve_dependencies(
    *,
    request: Union[Request, WebSocket],
    dependant: Dependant,
    body: Optional[Union[dict[str, Any], FormData]] = None,
    background_tasks: Optional[StarletteBackgroundTasks] = None,

from fastapi.dependencies.utils import (
    _should_embed_body_fields,
    get_body_field,
    get_dependant,
    get_flat_dependant,
    get_parameterless_sub_dependant,
    get_typed_return_annotation,
    solve_dependencies,
)
from fastapi.encoders import jsonable_encoder
from fastapi.exceptions import (
    EndpointContext,
    FastAPIError,
    PydanticV1NotSupportedError,
    RequestValidationError,

### Refactors

* ♻️ Create `dependency-cache` dict in `solve_dependencies` only if `None` (don't re-create if empty). PR [#13689](https://github.com/fastapi/fastapi/pull/13689) by [@bokshitsky](https://github.com/bokshitsky).