def METHOD_NAME():
    global cell, KGCCSD_TEST_THRESHOLD
    cell = pbcgto.Cell()
    cell.atom = '''
    He 0.000000000000   0.000000000000   0.000000000000
    He 1.685068664391   1.685068664391   1.685068664391
    '''
    cell.basis = [[0, (1., 1.)], [0, (.5, 1.)]]
    cell.a = '''
    0.000000000, 3.370137329, 3.370137329
    3.370137329, 0.000000000, 3.370137329
    3.370137329, 3.370137329, 0.000000000'''
    cell.unit = 'B'
    cell.build()
    KGCCSD_TEST_THRESHOLD = 1e-8