Interface BindingOnSyntax<T>

interface BindingOnSyntax<T> {
    onActivation(
        fn: (context: Context, injectable: T) => T | Promise<T>,
    ): BindingWhenSyntax<T>;
    onDeactivation(
        fn: (injectable: T) => void | Promise<void>,
    ): BindingWhenSyntax<T>;
}