end
require_dependency 'peta/item'
require_dependency 'peta/owner'
+require_dependency 'peta/system_resource'
require_dependency 'peta/content'
-require_dependency 'peta/element'
-require_dependency 'peta/element_part'
+require_dependency 'peta/element_nestable_content'
require_dependency 'peta/root'
+require_dependency 'peta/element'
+require_dependency 'peta/binder'
+require_dependency 'peta/leaf'
require_dependency 'peta/editize'