def insertFace(bm, v):
    """
    insert face using an array of vertices indices

    :param bm:
    :param v: list of vertices indices
    """
    a = []
    for k in range(len(v)):
        a.append(bm.verts[v[k]])
    f = bm.faces.new(a)
    bm.faces.ensure_lookup_table()
    return f