Cannot resolve symbol CompletionAwareAggregationStrategy, TimeoutAwareAggregationStrategy

I'm migrating a Spring 2.6 project from Apache Camel v2.25.4 to v3.14, the last version that is compatible with Java 8. I'm using Maven as package manager.

I'm getting this error:

Cannot resolve symbol 'CompletionAwareAggregationStrategy', TimeoutAwareAggregationStrategy'

Apparently, these interfaces are removed from version 3.0.0 onwards, but I couldn't find any information about it in the migration guide. The only related step is the following: Camel Upgrade guide to 3.7 - Modularized core.

They are still mentioned in the documentation for version 3.14:

• AGGREGATING ON TIMEOUT
• COMPLETIONAWAREAGGREGATIONSTRATEGY

I have tried importing other packages like the ones mentioned in the migration guide:

• camel-core-model
• camel-core-reifier
• camel-core-processor

But I had no success finding the symbols.

I have also tried implementing my classes with these related interfaces, but they don't extend 'AggregationStrategy' interface, so it's not what I'm looking for.

• FlexibleAggregationStrategy.TimeoutAwareMixin
• FlexibleAggregationStrategy.CompletionAwareMixin

If they have been removed from Apache Camel, then how do you suggest I replace the interfaces?

They are out of the box on org.apache.camel.AggregationStrategy as default methods.