public synchronized boolean isLoaded() {
		if (children == null) {
			return false;
		}
		if (Swing.isSwingThread()) {
			return true;
		}
		return !isInProgress(children);
	}
True if the children for this node have been loaded yet.  Some GTree nodes are lazy in that they
don't load their children until needed. Nodes that have the IN_PROGRESS node as it child
is considered loaded if in the swing thread, otherwise they are considered not loaded. 
@return true if the children for this node have been loaded.
Ghidra/Framework/Docking/src/main/java/docking/widgets/tree/CoreGTreeNode.java