def document_nav_links(obj):
 return combine_funcs(obj, (parent_document_link, topic_parent_document_link, topic_sibling_documents_link, topic_children_documents_link))

def document_nav_links ( obj ) : return combine_funcs ( obj , ( parent_document_link , topic_parent_document_link , topic_sibling_documents_link , topic_children_documents_link ) )
combine the document hierarchy nav links .