val leftOperandPsi = deparenthesize(psi.left) ?: return null
            val compoundAssignKind = psi.getCompoundAssignKind()

            // handle compound assignment with array access convention
            if (fir is FirFunctionCall && fir.calleeReference.name == OperatorNameConventions.SET && leftOperandPsi is KtArrayAccessExpression) {

        get() {
            val sourcePsi = when {
                // array type for vararg parameters is not present in the code, so no need to handle it
                delegatedTypeRef?.source?.kind == KtFakeSourceElementKind.ArrayTypeFromVarargParameter -> null

                // but the array's underlying type is present with a fake source, and needs to be handled