* class could be unloaded after the above call to `getEnumConstants` but before we call
     * `get()`, but that is vanishingly unlikely.
     */
    return ref == null ? Optional.absent() : Optional.fromNullable(enumClass.cast(ref.get()));
  }

  static String formatCompact4Digits(double value) {
    return String.format(Locale.ROOT, "%.4g", value);
  }

    dynamicAnchor: Optional[str] = Field(default=None, alias="$dynamicAnchor")
    ref: Optional[str] = Field(default=None, alias="$ref")
    dynamicRef: Optional[str] = Field(default=None, alias="$dynamicRef")
    defs: Optional[Dict[str, "SchemaOrBool"]] = Field(default=None, alias="$defs")
    comment: Optional[str] = Field(default=None, alias="$comment")

                    "required": ["item", "item2"],
                    "type": "object",
                    "properties": {
                        "item": {"$ref": "#/components/schemas/Item"},
                        "item2": {"$ref": "#/components/schemas/Item"},
                    },
                },
                "HTTPValidationError": {
                    "title": "HTTPValidationError",

                                        "title": "Response Read Users Users  Get",
                                        "type": "array",
                                        "items": {"$ref": "#/components/schemas/User"},
                                    }
                                }
                            },
                        },
                        "422": {

                                        "title": "Response Read Users Users  Get",
                                        "type": "array",
                                        "items": {"$ref": "#/components/schemas/User"},
                                    }
                                }
                            },
                        },
                        "422": {

                                        "title": "Response Read Users Users  Get",
                                        "type": "array",
                                        "items": {"$ref": "#/components/schemas/User"},
                                    }
                                }
                            },
                        },
                        "422": {

    grad_inputs[1] = grad_outputs[0];

    grad_inputs[0]->Ref();
    grad_inputs[1]->Ref();
    return absl::OkStatus();
  }
  ~AddGradientFunction() override {}
};

class ExpGradientFunction : public GradientFunction {
 public:
  explicit ExpGradientFunction(AbstractTensorHandle* exp) : exp_(exp) {
    exp->Ref();
  }
  Status Compute(AbstractContext* ctx,

                            "content": {
                                "application/json": {
                                    "schema": {
                                        "$ref": "#/components/schemas/HTTPValidationError"
                                    }
                                }
                            },
                        },
                    },

                            "content": {
                                "application/json": {
                                    "schema": {
                                        "$ref": "#/components/schemas/HTTPValidationError"
                                    }
                                }
                            },
                        },
                    },

                            "description": "Successful Response",
                            "content": {
                                "application/json": {
                                    "schema": {"$ref": "#/components/schemas/ModelA"}
                                }
                            },
                        },
                        "422": {
                            "description": "Validation Error",