I am writing a gem which provides helpers for views. The HTML I want to insert via the helper is complex enough that I'd rather write it in a _partial.html.erb file. How do I get the gem's view path include in the application's load_path?

Note: the only gem I've found that does something like this is Devise. When a view cannot be found, Rails prints the load path which (on my machine) looks like:

Missing partial sortable_nested_set/tree with {:handlers=>[:erb, :rjs, :builder, :rhtml, :rxml], :formats=>[:html], :locale=>[:en, :en]} in view paths "/home/jason/VirtualRestaurant3/app/views", "/home/jason/.rvm/gems/ruby-1.9.2-preview3/gems/devise-1.1.rc0/app/views"

How does Devise do it?

My gem: http://github.com/jrmurad/SortableNestedSet Devise gem: +http://+github.com/plataformatec/devise