Adds a child object <VAR>theObject</VAR> to the given father <VAR>theFather</VAR> object in the use case.
*/
boolean AppendTo(in SObject theFather, in SObject theObject);
+/*!
+ Return index of a child among father children
+*/
+ long GetIndexInFather(in SObject theFather, in SObject theObject);
/*!
Inserts in the use case the object <VAR>theFirst</VAR> before the object <VAR>theNext</VAR>.
*/