a.blade.php

A BEGIN
@yield('content')
A END

c.blade.php

@extends('a')

@section('content')

@wrapper('pagecontainer')
C BEGIN
C END
@endwrapper
  
@stop

d.blade.php

@extends('a')

@section('content')

D BEGIN
D END
  
@stop

output.html

A BEGIN
B BEGIN
C BEGIN
C END
B END
A END

pagecontainer.blade.php

B BEGIN
@child
B END