def update_node_helper(source: nx.Graph, target: nx.Graph) -> None:
    """Update the nodes' data dictionaries in the target graph from the source graph.

    :param source: The universe of all knowledge
    :param target: The target BEL graph
    """
    for node in target:
        if node in source:
            target.nodes[node].update(source.nodes[node])
Update the nodes' data dictionaries in the target graph from the source graph.

    :param source: The universe of all knowledge
    :param target: The target BEL graph