type Primitive = string | number | boolean | symbol | bigint | null | undefined;
type IsReadonly<This, Property extends keyof This> = (<F>() => F extends {
    [P in Property]: This[Property];
} ? 1 : 2) extends (<F>() => F extends {
    -readonly [P in Property]: This[Property];
} ? 1 : 2) ? false : true;
type Callback<This> = (this: This, field: string | symbol, newValue: unknown) => void;
type ReturnType<This, Property extends keyof This = keyof This> = IsReadonly<This, Property> extends true ? (_: undefined, ctx: ClassFieldDecoratorContext<This, This[Property]>) => void : This[Property] extends Primitive ? (_: undefined, ctx: ClassFieldDecoratorContext<This, This[Property]>) => void : never;
declare function reactive<This, Property extends keyof This, Value = This[Property]>(cb: Value extends Primitive ? Callback<This> : never): ReturnType<This>;
declare function reactive<This, Property extends keyof This, Value = This[Property]>(watchedFields: Value extends Primitive ? never : Array<keyof Value>, cb: Callback<This>): ReturnType<This>;
export default reactive;