val useSiteUnwrapped = unwrapUseSiteSubstitutionOverride()
    if (useSiteUnwrapped !is CallableMemberDescriptor) return useSiteUnwrapped
    if (useSiteUnwrapped.kind.isReal) return useSiteUnwrapped
    val overriddenDescriptor = useSiteUnwrapped.overriddenDescriptors.singleOrNull()?.unwrapUseSiteSubstitutionOverride()
        ?: return useSiteUnwrapped

     * N.B. This functions lifts only a single layer of SUBSTITUTION_OVERRIDE at a time.
     */
    private inline fun <reified T : FirCallableDeclaration> T.unwrapSubstitutionOverrideIfNeeded(): T? {
        unwrapUseSiteSubstitutionOverride()?.let { return it }

        unwrapInheritanceSubstitutionOverrideIfNeeded()?.let { return it }

        return null
    }

    /**