example.blade.php

<div class="form-group">
    <div class="form-group">
        <label for="name">Email</label>
        <input markdown="1" type="text" name="email" class="form-control" value="@if($user->email){{ $user->email  }}@endif"/>
    </div>
</div>

@include('feature_flags::twitter_name_input')

<div class="form-group">
    <div class="form-group">
        <label for="active">Is Admin</label>
        @if($user->is_admin && $user->is_admin == 1)
            <input type="checkbox" name="is_admin" class="form-control" checked="checked" value="1">
        @else
            <input type="checkbox" name="is_admin" class="form-control" value="1">
        @endif
    </div>
</div>

partial.blade.php

@can('add-twitter-field')
<div class="form-group">
    <div class="form-group">
        <label for="twitter">Twitter Name</label>
        <input type="text" name="twitter" class="form-control" value="@if($user->twitter){{ $user->twitter }}@endif"/>
    </div>
</div>
@endcan

snippet.blade.php

@can('add-twitter-field')
<!-- code here -->
@endcan