public <T extends Spatial> List<T> descendantMatches(String nameRegex) {
        return descendantMatches(null, nameRegex);
    }
Convenience wrapper.

@param <T> the type of Spatial returned
@param nameRegex regular expression to match Spatial names against, or null for all spatials
@return a new list of pre-existing spatials (may be empty)
@see #descendantMatches(java.lang.Class, java.lang.String)
jme3-core/src/main/java/com/jme3/scene/Node.java