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@ParentProperty Annotation

<p>
	The {@link oaj.annotation.ParentProperty @ParentProperty} annotation is used to
	identify a setter as a method for adding a parent reference to a child object.
</p>
<p>
	A commonly-used case is when you're parsing beans and a child bean has a reference to a parent bean.
</p>
<p class='bpcode w800'>
	<jk>public class</jk> AddressBook {
		<jk>public</jk> List&lt;Person&gt; <jf>people</jf>;
	}

	<jk>public class</jk> Person {
	
		<ja>@ParentProperty</ja> 
		<jk>public</jk> AddressBook <jf>addressBook</jf>;  <jc>// A reference to the containing address book.</jc>
		
		<jk>public</jk> String <jf>name</jf>;
		
		<jk>public char</jk> <jf>sex</jf>;
	}
</p>
<p>
	Parsers will automatically set this field for you in the child beans.
</p>