"anyOf": [
                    {
                        "type": "array",
                        "items": {
                            "type": "string",
                            "contentMediaType": "application/octet-stream",
                        },
                    },
                    {"type": "null"},
                ],
                "title": "P",
            }
        },

    assert app.openapi()["components"]["schemas"][body_model_name] == {
        "properties": {
            "p": {
                "anyOf": [
                    {"type": "string", "contentMediaType": "application/octet-stream"},
                    {"type": "null"},
                ],
                "title": "P",
            }
        },
        "title": body_model_name,
        "type": "object",
    }

        "properties": {
            "p": {
                "type": "array",
                "items": {
                    "type": "string",
                    "contentMediaType": "application/octet-stream",
                },
                "title": "P",
            },
        },
        "required": ["p"],
        "title": body_model_name,
        "type": "object",
    }

    # and dropping support for any version of Pydantic before that one (so, in a very long time)
    def bytes_schema(self, schema: CoreSchema) -> JsonSchemaValue:
        json_schema = {"type": "string", "contentMediaType": "application/octet-stream"}
        bytes_mode = (
            self._config.ser_json_bytes
            if self.mode == "serialization"
            else self._config.val_json_bytes
        )

    # A Vocabulary for the Contents of String-Encoded Data
    contentEncoding: str | None = None
    contentMediaType: str | None = None
    contentSchema: Optional["SchemaOrBool"] = None
    # Ref: JSON Schema Validation 2020-12: https://json-schema.org/draft/2020-12/json-schema-validation.html#name-a-vocabulary-for-basic-meta