private void queueNextFiles() {
			DomainFolder folder;
			while (fileQueue.isEmpty() && (folder = folderQueue.poll()) != null) {
				DomainFolder[] folders = folder.getFolders();
				for (int i = folders.length - 1; i >= 0; i--) {
					DomainFolder subfolder = folders[i];
					folderQueue.addFirst(subfolder);
				}
				for (DomainFile subfile : folder.getFiles()) {
					fileQueue.addLast(subfile);
				}
			}
		}
Recursively traverse the {@link DomainFile}s under a specific {@link DomainFolder}.

@param startFolder
Ghidra/Framework/Project/src/main/java/ghidra/framework/model/ProjectDataUtils.java