def METHOD_NAME(root_token):
    dependency_tree_tokens = list()
    token_queue = [root_token]
    while len(token_queue) > 0:
        token = token_queue[0]
        dependency_tree_tokens.append(token.text)
        token_queue = token_queue[1:]
        for child in token.children:
            token_queue.append(child)
    return dependency_tree_tokens