TreeListBuilder<T>.KeyExpr Method

Name	Parameters	Description
KeyExpr(JS)	value	Specifies the key property (or properties) that provide(s) key values to access data items. Each key value must be unique. Mirrors the client-side keyExpr option.
KeyExpr(String)	value	Specifies the key property (or properties) that provide(s) key values to access data items. Each key value must be unique. Mirrors the client-side keyExpr option.