Add a new child to the collection of childrenparamproperty the new child to be added; must not be nullexceptionIOException if the Parent already has a child with the same name
Get an iterator over the children of this Parent; all elements are instances of Property.returnIterator of children; may refer to an empty collection
Set the next Childparamchild the new 'next' child; may be null, which has the effect of saying there is no 'next' child
Set the previous Childparamchild the new 'previous' child; may be null, which has the effect of saying there is no 'previous' child