public void setActivities(java.util.Map<String, Activity> activities) {
        this.activities = activities;
    }
<p>
A map that contains a set of Activity objects, one object for each activity in the journey. For each Activity
object, the key is the unique identifier (string) for an activity and the value is the settings for the activity.
</p>

@param activities
       A map that contains a set of Activity objects, one object for each activity in the journey. For each
       Activity object, the key is the unique identifier (string) for an activity and the value is the settings
       for the activity.
aws-java-sdk-pinpoint/src/main/java/com/amazonaws/services/pinpoint/model/JourneyResponse.java