<?php

class Foo
{
    /** @var list<string>|(\ArrayAccess<int, string>&iterable<int, string>) */
    private iterable $values;

    /**
     * @param list<string> $values
     */
    public function update(array $values): void {
        foreach ($this->values as $key => $_) {
            unset($this->values[$key]);
        }

        foreach ($values as $value) {
            $this->values[] = $value;
        }
    }
}