docs: def intersect2d(A, B):
      """
      intersect2d
  
      intersect rows of 2d numpy arrays
  
      DEPRICATE: use intersect2d in vtool instead
  
      Args:
          A (ndarray[ndim=2]):
          B (ndarray[ndim=2]):
  
      Returns:
          tuple: (C, Ax, Bx)
  
      Example:
          >>> # ENABLE_DOCTEST
          >>> from utool.util_numpy import *  # NOQA
          >>> import utool as ut
          >>> A = np.array([[1, 2, 3], [1, 1, 1]])
          >>> B = np.array([[1, 2, 3], [1, 2, 14]])
          >>> (C, Ax, Bx) = ut.intersect2d(A, B)
          >>> result = str((C, Ax, Bx))
          >>> print(result)
          (array([[1, 2, 3]]), array([0]), array([0]))
      """
      Cset  =  set(tuple(x) for x in A).intersection(set(tuple(x) for x in B))
      Ax = np.array([x for x, item in enumerate(A) if tuple(item) in Cset], dtype=np.int)
      Bx = np.array([x for x, item in enumerate(B) if tuple(item) in Cset], dtype=np.int)
      C = np.array(tuple(Cset))
      return C, Ax, Bx