Bootstrap 4 Page Header

For reasons that don't make much sense, Bootstrap v4 removed the useful .page-header class. Here is what I am using as a reasonably close-enough replacement:

@import "path/to/bootstrap/scss/bootstrap.scss";

.page-header {
    @extend .mb-4;
    @extend .mt-5;
    @extend .pb-2;
    border-bottom: 1px solid $gray-200;
}

This can then be used the same way as before:

<div class="page-header">
  <h1>Header Text</h1>
</div>