app/views/trestle/application/_header.html.erb
<header class="content-header">
<div class="content-header-title">
<h1><%= title %></h1>
<% unless local_assigns.fetch(:hide_breadcrumbs, false) %>
<ol class="breadcrumb">
<% breadcrumbs.each do |breadcrumb| %>
<li class="breadcrumb-item<% if breadcrumb == breadcrumbs.last %> active<% end %>">
<%= link_to breadcrumb.label, breadcrumb.path %>
</li>
<% end %>
</ol>
<% end %>
</div>
<div class="content-header-toolbars">
<div class="btn-toolbar primary-toolbar" role="toolbar">
<%= render_toolbar(toolbar(:primary)) %>
<%= deprecated_toolbar(:primary) %>
</div>
<div class="btn-toolbar secondary-toolbar" role="toolbar">
<%= render_toolbar(toolbar(:secondary)) %>
<%= deprecated_toolbar(:secondary) %>
</div>
</div>
</header>