end_new()
instantiates a newend
node.end_type()
checks if the node is aend
node.end_<child>_get()
returns the<child>
node ofend
.end_<child>_set()
sets the new<child>
and deletes the old<child>
.end_<child>_rep()
sets the new<child>
and returns the old<child>
.