lass or interface in java.util" class="external-link">computeIfAbsent</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Map.html#computeIfPresent(K,java.util.function.BiFunction)" title="class or interface in java.util" class="external-link">computeIfPresent</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Map.html#containsKey(java.lang.Object)" title="class or interface in java.util" class="external-link">containsKey</a>, <a href="https