def get_nodes(graph, metanode):
    """
    Return a list of nodes for a given metanode, in sorted order.
    """
    metanode = graph.metagraph.get_metanode(metanode)
    metanode_to_nodes = graph.get_metanode_to_nodes()
    nodes = sorted(metanode_to_nodes[metanode])
    return nodes