def find_vswitch_uri_for_id(k2_id, vswitch_map):
    """
    Returns the vSwitch href URI for a given K2 id.
    :param k2_id: The K2 vSwitch ID
    :param vswitch_map: The vSwitch map from the HMC Topo
    :returns: vSwitch URI
    """
    k2_obj = vswitch_map.get(k2_id)
    if not k2_obj:
        return None
    return k2_obj.properties['link']