auth/app/src/main/java/com/google/firebase/quickstart/auth/java/MultiFactorSignInFragment.java [61:69]:
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        List<Button> phoneFactorButtonList = new ArrayList<>();
        phoneFactorButtonList.add(mBinding.phoneFactor1);
        phoneFactorButtonList.add(mBinding.phoneFactor2);
        phoneFactorButtonList.add(mBinding.phoneFactor3);
        phoneFactorButtonList.add(mBinding.phoneFactor4);
        phoneFactorButtonList.add(mBinding.phoneFactor5);

        for (Button button : phoneFactorButtonList) {
            button.setVisibility(View.GONE);
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auth/app/src/main/java/com/google/firebase/quickstart/auth/java/MultiFactorUnenrollFragment.java [41:49]:
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        List<Button> phoneFactorButtonList = new ArrayList<>();
        phoneFactorButtonList.add(mBinding.phoneFactor1);
        phoneFactorButtonList.add(mBinding.phoneFactor2);
        phoneFactorButtonList.add(mBinding.phoneFactor3);
        phoneFactorButtonList.add(mBinding.phoneFactor4);
        phoneFactorButtonList.add(mBinding.phoneFactor5);

        for (Button button : phoneFactorButtonList) {
            button.setVisibility(View.GONE);
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