*   list.get(10) // this call
     * }
     * ```
     *
     * In FIR, `List::get` symbol in the example will be a substitution override with a `String` instead of `A`.
     * We want to lift such substitution overrides.
     *
     * @receiver A declaration that needs to be unwrapped.
     * @return An unsubstituted declaration ([originalForSubstitutionOverride]]) if [this] is a use-site substitution override.