def METHOD_NAME():
    global cell, kmf, kci, eris
    cell = gto.Cell()
    cell.a = np.eye(3) * 2.5
    cell.mesh = [11] * 3
    cell.atom = '''He    0.    2.       1.5
                   He    1.    1.       1.'''
    cell.basis = {'He': [(0, (1.5, 1)), (0, (1., 1))]}
    cell.build()
    kmf = scf.KRHF(cell, kpts=cell.make_kpts([2,1,1]), exxdiv=None).run()
    kci = ci.KCIS(kmf)
    eris = kci.ao2mo()