Function signal

signal<Value>(initial?: Value): SignalBox<Value>

signal<Type extends object, Value>(
    value:
        | ((initial: Value) => Value)
        | ((this: Type) => Value)
        | ((this: Type, v: Value) => void)
        | {
            get?: (this: Type) => Value;
            set?: (this: Type, value: Value) => void;
        },
    context:
        | ClassFieldDecoratorContext<Type, Value>
        | ClassGetterDecoratorContext<Type, Value>
        | ClassSetterDecoratorContext<Type, Value>
        | ClassAccessorDecoratorContext<Type, Value>,
): any