from pydantic import BaseModel, ValidationInfo, field_validator

    app = FastAPI()

    class ModelB(BaseModel):
        username: str

    class ModelC(ModelB):
        password: str

    class ModelA(BaseModel):
        name: str
        description: Optional[str] = None
        foo: ModelB

        @field_validator("name")
        def lower_username(cls, name: str, info: ValidationInfo):

from fastapi import Depends, FastAPI
from pydantic import BaseModel, validator

app = FastAPI()


class ModelB(BaseModel):
    username: str


class ModelC(ModelB):
    password: str


class ModelA(BaseModel):
    name: str
    description: Optional[str] = None
    model_b: ModelB

    @validator("name")
    def lower_username(cls, name: str, values):
        if not name.endswith("A"):

                        "description": {"title": "Description", "type": "string"},
                        "model_b": {"$ref": "#/components/schemas/ModelB"},
                    },
                },
                "ModelB": {
                    "title": "ModelB",
                    "required": ["username"],
                    "type": "object",

	// libraries to look up the resource name, find the pods it selects, and return
	// one of those pods.
	builder := factory.NewBuilder().
		WithScheme(kubelib.IstioScheme, kubelib.IstioScheme.PrioritizedVersionsAllGroups()...).
		NamespaceParam(ns).DefaultNamespace().
		SingleResourceType()
	builder.ResourceNames("pods", resname)
	infos, err := builder.Do().Infos()
	if err != nil {

 *  Fix a bug in `Content-Length` reporting for gzipped streams in the Apache
    HTTP client adapter. (thanks kwuollett)
 *  Work around the Alcatel `getByInetAddress` bug (thanks k.kocel)
 *  Be more aggressive about testing pooled sockets before reuse. (thanks
    warpspin)
 *  Include `Content-Type` and `Content-Encoding` in the Apache HTTP client
    adapter. (thanks kwuollett)