public void setChildConnectionGroups(Collection<APIConnectionGroup> childConnectionGroups) {
        this.childConnectionGroups = childConnectionGroups;
    }
Sets the collection of all child connection groups to the given
collection, which may be null if children have not been queried.

@param childConnectionGroups
    The collection containing all child connection groups of this
    connection group, or null if children have not been queried.
guacamole/src/main/java/org/apache/guacamole/rest/connectiongroup/APIConnectionGroup.java