class _RetryCounter:
    def __init__(self, max_retries):
        self.max_retries = max_retries
        self.counts = {}

    def increment(self, key):
        if key not in self.counts:
            self.counts[key] = 0
        self.counts[key] += 1

    def get_count(self, key):
        return self.counts.get(key, 0)

    def is_maxed_out(self, key):
        return self.get_count(key) >= self.max_retries