P - the type of parent for this childpublic interface Child<P>
Child interface defines the contract for an object which
 maintains a reference to a "parent" object.| Modifier and Type | Method and Description | 
|---|---|
P | 
getParent()
Get the parent object for this child, or  
null if there is none. | 
void | 
setParent(P parent)
Set the parent object for this child. 
 |