def METHOD_NAME(spec, state):
    transition_to_valid_shard_slot(spec, state)
    transition_to(spec, state, state.slot + 1)  # Make len(offset_slots) == 1
    shard = 0
    offset_slots = spec.get_offset_slots(state, shard)
    shard_transition = get_sample_shard_transition(spec, state.slot, [2**15 // 3] * len(offset_slots))
    attestation = get_valid_attestation(spec, state, index=shard, signed=True,
                                        shard_transition=shard_transition)
    transition_to(spec, state, state.slot + spec.MIN_ATTESTATION_INCLUSION_DELAY)
    _, _, _ = run_attestation_processing(spec, state, attestation)
    validator_index = spec.get_beacon_committee(
        state,
        attestation.data.slot,
        attestation.data.index
    )[0]
    spec.initiate_validator_exit(state, validator_index)
    assert state.validators[validator_index].withdrawable_epoch < spec.FAR_FUTURE_EPOCH
    next_epoch_via_block(spec, state)
    assert state.validators[validator_index].withdrawable_epoch == spec.FAR_FUTURE_EPOCH
    while spec.get_current_epoch(state) < state.validators[validator_index].exit_epoch:
        next_epoch_via_block(spec, state)
    while (state.validators[validator_index].next_custody_secret_to_reveal
           <= spec.get_custody_period_for_validator(
               validator_index,
               state.validators[validator_index].exit_epoch - 1)):
        custody_key_reveal = get_valid_custody_key_reveal(spec, state, validator_index=validator_index)
        _, _, _ = run_custody_key_reveal_processing(spec, state, custody_key_reveal)
    next_epoch_via_block(spec, state)
    challenge = get_valid_chunk_challenge(spec, state, attestation, shard_transition)
    _, _, _ = run_chunk_challenge_processing(spec, state, challenge)
    next_epoch_via_block(spec, state)
    assert state.validators[validator_index].withdrawable_epoch == spec.FAR_FUTURE_EPOCH
    chunk_challenge_index = state.custody_chunk_challenge_index - 1
    custody_response = get_valid_custody_chunk_response(
        spec, state, challenge, chunk_challenge_index, block_length_or_custody_data=2**15 // 3)
    _, _, _ = run_custody_chunk_response_processing(spec, state, custody_response)
    yield from run_process_custody_final_updates(spec, state)
    assert state.validators[validator_index].withdrawable_epoch < spec.FAR_FUTURE_EPOCH